Livia Valeria Palace

Location: 8 Via Giacomo Folchi, Rome, it

Star Rating: 9.1 Stars

Property Type: Hotels

About this Property

Important Information

Policies

Check-in: 02:00 PM - 11:00 PM

Check-out: 10:30 AM

Amenities & Facilities

• Parking
• Air conditioning
• Swimming pool
• Terrace
• Family rooms
• Lift / Elevator
• Luggage storage
• Express check-in/check-out
• Safety deposit box
• Fax/photocopying
• Tour desk
• Soundproof rooms
• Facilities for disabled guests
• Non-smoking throughout
• Private check-in/check-out
• Shared lounge/TV area
• Shuttle service (additional charge)
• Concierge service
• Wheelchair accessible
• Allergy-free room
• Heated pool
• Public transport tickets
• Lower bathroom sink
• Infinity pool
• Salt-water pool
• Emergency cord in bathroom
• Outdoor furniture
• Coffee Shop on site
• Spa/wellness center services
• Beauty Services
• Manicure
• Pedicure
• Staff adhere to local safety protocols
• Guest rooms disinfected between stays
• Cleaning standards that are effective against Coronavirus
• Physical distancing rules followed
• Hand sanitizer in guest room and key areas
• Cashless payment available
• First aid kit available
• Sanitized tableware & silverware
• Contactless check-in/check-out
• Invoice provided
• Shared stationery like menus, pens are removed
• Guest room sealed after cleaning
• Property cleaned by professional cleaning companies
• Physical distancing in dining areas
• Key access
• Food delivered to guest room
• CCTV outside property
• Process in place to check health of guests
• Access to health care professionals
• Face masks for guests available
• 24-hour security
• Delivered food - securely covered
• Security alarm
• Thermometers for guests provided by property
• Television in common areas
• Express check-in
• Free wired internet
• Access to nearby outdoor pool
• Self parking (surcharge)
• Beach umbrellas
• Pool sun loungers
• Internet access
• Housekeeping on request
• Wine release events
• Exercise/lap pool
• Japanese garden
• Swimming nearby
• Accessible shuttle
• No accessible shuttle

Rooms Available

• Superior Apartment with Balcony

  Boasting a private entrance, this air-conditioned apartment includes 1 living room, 1 separate bedroom and 1 bathroom with a shower and a bidet. Guests can make meals in the kitchen that is fitted with a stovetop, a refrigerator, kitchenware and a microwave. The apartment offers a flat-screen TV, soundproof walls, a wardrobe, a safe deposit box as well as garden views. The unit has 2 beds.

  Max Occupancy: 4 (3 Adults)

  • Coffee/tea maker
  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Microwave
  • Private bathroom
  • Heating
  • Kitchen
  • Interconnected room(s) available
  • Private entrance
  • Sofa
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Stovetop
  • Bidet
  • Hypoallergenic
  • Coffee machine
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Entire unit located on ground floor
  • Toilet paper
  • Sofa bed
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Single-room air conditioning for guest accommodation

• Deluxe Apartment with Balcony

  Boasting a private entrance, this air-conditioned apartment includes 1 living room, 1 separate bedroom and 1 bathroom with a shower and a bidet. In the fully equipped kitchen, guests will find a stovetop, a refrigerator, kitchenware and a microwave. The apartment offers a flat-screen TV, soundproof walls, a wardrobe, a safe deposit box as well as garden views. The unit has 2 beds.

  Max Occupancy: 5 (3 Adults)

  • Coffee/tea maker
  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Microwave
  • Private bathroom
  • Heating
  • Kitchen
  • Private entrance
  • Sofa
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Stovetop
  • Bidet
  • Hypoallergenic
  • Coffee machine
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Entire unit located on ground floor
  • Toilet paper
  • Sofa bed
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Single-room air conditioning for guest accommodation

• Apartment Premium with Balcony

  Featuring a private entrance, this air-conditioned apartment consists of a kitchen, 1 bedroom and 1 bathroom with a shower and a bidet. The well-fitted kitchen features a stovetop, a refrigerator, kitchenware and a microwave. The apartment provides a flat-screen TV, soundproof walls, a wardrobe, a safe deposit box as well as garden views. The unit offers 2 beds.

  Max Occupancy: 4 (3 Adults)

  • Coffee/tea maker
  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Kitchenette
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Microwave
  • Private bathroom
  • Heating
  • Kitchen
  • Private entrance
  • Sofa
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Stovetop
  • Bidet
  • Hypoallergenic
  • Coffee machine
  • Linen
  • Dining table
  • Outdoor furniture
  • Outdoor dining area
  • Entire unit located on ground floor
  • Toilet paper
  • Sofa bed
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Single-room air conditioning for guest accommodation

• Superior Double or Twin Room

  Featuring free toiletries, this twin/double room includes a private bathroom with a shower, a bidet and a hairdryer. The air-conditioned twin/double room features a flat-screen TV, soundproof walls, a wardrobe and a safe deposit box. The unit has 1 bed.

  Max Occupancy: 2 (2 Adults)

  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Private bathroom
  • Heating
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Bidet
  • Hypoallergenic
  • Linen
  • Toilet paper
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Accessible by lift
  • Single-room air conditioning for guest accommodation

• Deluxe Suite - Attic

  This suite consists of 1 living room, 2 separate bedrooms and 1 bathroom with a shower and free toiletries. This suite is air-conditioned and features a flat-screen TV, soundproof walls, a wardrobe and a safe deposit box. The unit offers 3 beds. This unit is located in the attic.

  Max Occupancy: 6 (5 Adults)

  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Private bathroom
  • Heating
  • Interconnected room(s) available
  • Sofa
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Bidet
  • Hypoallergenic
  • Linen
  • Upper floors accessible by elevator
  • Toilet paper
  • Sofa bed
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Accessible by lift
  • Single-room air conditioning for guest accommodation

• Junior Suite

  This suite includes 1 living room, 1 separate bedroom and 1 bathroom with a shower and free toiletries. This suite is air-conditioned and has a flat-screen TV, soundproof walls, a wardrobe and a safe deposit box. The unit has 2 beds.

  Max Occupancy: 3 (3 Adults)

  • Shower
  • Safety deposit box
  • TV
  • Air conditioning
  • Hair dryer
  • Bathrobe
  • Refrigerator
  • Desk
  • Toilet
  • Private bathroom
  • Heating
  • Sofa
  • Tile/marble floor
  • Electric kettle
  • Wardrobe or closet
  • Bidet
  • Hypoallergenic
  • Linen
  • Upper floors accessible by elevator
  • Toilet paper
  • Sofa bed
  • Salt water pool
  • Pool towels
  • Bottle of water
  • Trash cans
  • Cots
  • Shampoo
  • Body soap
  • Shower cap
  • Socket near the bed
  • Feather pillow
  • Hypoallergenic pillow
  • Accessible by lift
  • Single-room air conditioning for guest accommodation

Guest Reviews

• Anita (8/5): - The pool was amazing, the area was relaxing and clean. The location wasn't ideal for walkable areas. It was close to a hospital and fairly close to the tram
• Frank (10/5): -
• Nick (10/5): Geweldig. - Het was een hele mooie accommodatie en het lag niet midden in de stad. Hierdoor konden wij het wandelen door de stad afwisselen met relaxen bij het zwembad. Hierdoor hadden wij de perfect afwisseling tussen bezig zijn en relaxen. De medewerkers waren SUPER behulpzaam. We kregen allemaal tips over wat te bezoeken in Rome en alles was mogelijk als we wat nodig hadden. Super lieve mensen. Het enige wat ik dan zou kunnen zeggen is dat early check-in niet mogelijk was.
• lanckman (9/5): Superbe endroit calme, propre et personnel très réactif. - En tout point fidèle à la description avec en surprise une ameliration superbe de la terrasse autour de la piscine qui était encore en gazon sur les photos de l’an dernier. Appartement très bien agencé et grande terrasse Localisation dans un quartier résidentiel, hospitalier et pas toujours très propre. Manque de quelques ustensiles cuisine comme simple couteau pour couper des fruits,…
• Aurore (10/5): -
• Julie (9/5): Parfait pour une petite pause romantique - Un havre de paix pour échapper au centre ville Franchement j’ai passé un super week-end
• Luka (10/5): - We had a wonderful stay at Livia Valeria Palace. From the moment we made the reservation all the way until our departure, communication was perfect. The accommodation is beautiful, the breakfast is excellent, and the staff is extremely kind, always available, smiling, and warm. The rooms are very well equipped and cleanliness is at a high level. The location is excellent, just a few stops from the city center. This accommodation comes highly recommended and we will definitely return again. Thank you!
• Dimitri (9/5): -
• Julie (10/5): -
• Aleksander Tareev (7/5): - The hotel and room are fairly clean. The staff is generally friendly. There is a swimming pool. They provide information about availability a hotels parking. This is not true. There is only space for two cars. They offered me to park my car on the street among the trash and robbed cars. Breakfast very poor. To get a fried egg, you need to wait 20 minutes. Why did not you cooked it before? Next day they cooked scramble eggs, but the dishes were constantly empty. Why??? You knew in advance how many guests were staying at the hotel. Why do we have to wait 20 min for a simple breakfast? So I chose a hotel with parking and breakfast, but got a hotel with street parking and coffee with croissant.
• Jeroen (10/5): Absoluut fantastisch, een aanrader!! - Het verblijf is perfect, de medewerkers vriendelijk, Carlos is leuk en enthousiast. Heerlijk om na een dag in de drukte van Rome te relaxen bij het zwembad met een drankje. -
• Jason (9/5): - The enclosed ground with access to a pool and bar area for breakfast in the morning and drinks in the afternoon. The sofa bed is not very comfortable but it's understandable for what it is
• Faith (10/5): Brilliant hotel with a pool, just a tram ride from the centre! Fantastic staff! - Really lovely modern facilities with a great outdoor pool! We were not given much toilet paper for the length of our stay and had to ask for more.
• David (10/5): Nice clean comfortable place - Nice quiet place in Rome
• Anna (10/5): -
• Marcel (9/5): -
• Elzbieta (10/5): -
• Hans (8/5): - Sehr elegant und gepflegt Mindest Mietdauer
• Pavel (10/5): - krásné prostředí 30 min do centra
• Amanda (10/5): A charming gracious friendly family run place. We would stay again. - The hotel was charming and the staff were lovely having a pool was a bonus! It was a little far from the city centre but that was also positive . Bring your own toiletries.
• Terrence (9/5): Excellent! - Really friendly staff! Lovely gardens and warm swimming pool. Very relaxing. Easy to get to tram stop. Overall a great place to stay!
• Miloš (9/5): -
• Rolf (9/5): -
• Paul (9/5): -
• Cuzet (10/5): -
• Maria (7/5): -
• Henry (10/5): - Great location, delicious breakfast, very polite and helpful staff including the owner. The room was comfortable and the property was very pretty and well maintained.
• Claudia Rita (9/5): -
• Miller (10/5): Peaceful from the hustel and bustle of rome. The hotel was immaculate and Carlos was super helpful and friendly!! - Everything!!! We loved it all.
• Guadalupe (9/5): -
• Elena (10/5): -
• Dragana (8/5): Sehr nettes personal -
• Rebekka (10/5): - Wir hatten einen tollen Aufenthalt und haben uns sehr wohl gefühlt. Das Personal war super freundlich und das Zimmer richtig schön. Für unsere einjährige Tochter gab es neben dem Babybett auch ausreichend Platz zum Spielen.
• Ярослав (8/5): Все добре - Готель справив дуже приємне враження. В номері чисто та охайно, прибирання проводилось щодня, що для нас було великим плюсом. Регулярно застеляли ліжка та змінювали рушники — все на високому рівні. Персонал ввічливий та привітний, завжди готовий допомогти. В цілому залишились задоволені проживанням. Особливих зауважень немає. Рекомендуємо 👍
• Roy (9/5): - Het complex (een centraal gebouw met daarom heen 'huisjes') is heel mooi. Personeel is superaardig. Zwembad was nog net niet klaar/open, dat was jammer. Maar begrijpelijk aangezien het april was. Als dat ook nog open is, topaccomodatie. De buurt is niet zo bijzonder, maar met de tram (op 5/8 minuten lopen) ben je snel in het centrum.
• Ibrahim (9/5): - L’impression de rentrer dans un environnement super reposant dans une ville vibrante et pleine de mouvemenf. Personnel très agréable. Rien
• Denny (10/5): - Pulizia e cortesia Tutto perfetto. Nulla da segnalare
• 黃 (10/5): -
• Анна (10/5): -
• Youri (10/5): Fantastisch kleinschalig hotel aan de rand van de stad. - Mooi en modern hotel met uitstekende faciliteiten. Goed gelegen om met het openbaar vervoer de stad te verkennen. Het personeel is erg vriendelijk en uitnodigend. Zwembad was helaas nog niet open (vanaf 1 mei pas)
• Kristel (10/5): Om zeker te herhalen - Ontzettend mooi en stijlvol met de meest vriendelijke mensen. Goed georganiseerd als je later toekomt dan receptie open is. Zeer behulpzaam en gastvrij. Mensen dat hun job met hun volle hart doen. Niets dat niet beviel, alles perfect
• Tracy (9/5): -
• Sifu (9/5): -
• Astrid (8/5): - Moderna, comfortabila Locatia putine departe de centru dar este aproape de transportul in comun Curatenia ok
• Nicole (9/5): Insgesamt waren wir sehr zufrieden, würden auch wieder buchen - Lage und Ausstattung Das Frühstück war etwas speziell, die Auswahl sehr eingeschränkt, vor allem beim Brot, es gab leider nur weißes Toastbrot und süße Hörnchen. Der Pool war leider noch abgedeckt, obwohl es 26° waren. (war allerdings vorher in der Beschreibung auch dargestellt), trotzdem schade…
• Jaana (10/5): Tyylikäs miljöö, erinomainen palvelu - Tilava, siisti ja toimiva huoneisto kahdella terassilla, rauhallinen sijainti. Huoneisto siivottiin päivittäin. Hyvät sängyt. Hotelli oli tyylikkäästi sisustettu, piha-alueella oli mm uima-allas aurinkotuoleineen. Kaunis aamiais-sali jossa tehtiin oman toiveen mukaiset kahvit ja omeletit. Aamiainen oli riittävä ja se oli kauniisti esillä. Ystävällinen ja auttavainen omistaja-pariskunta, erityiset kiitokset myös infon sympaattiselle ja iloiselle Carlolle jolta saimme hyvät vinkit kaupunkiin tutustumiseen. Bussipysäkki oli lähellä mutta lyhyen kävelymatkan päässä (sairaalaan vieressä) oli ratikkapysäkki josta pääsi kätevästi eri puolille kaupunkia, ratikan (nro 8) päätepysäkiltä löytyi hyvin myös tärkeimmät nähtävyydet. Sairaalan ratikkapysäkin vierestä löytyi edulliset kahvilat ja kynsistudio jossa kävimme manikyyrissä. Lyhyen kävelymatkan päässä hotellista löytyi myös erinomainen ravintola Mamami josta nautimme hyvät illalliset, lämmin suositus! Etukäteen oli sovittu että meillä on erilliset sängyt mutta saapuessamme sänky oli pedattu vain yhdellä peitolla. Seuraavana päivänä asia järjestyi josta kiitos.
• Fanni (9/5): -
• Arjan (9/5): Zeer prettig verblijf in Rome - Uitstekend personeel, ruime kamer. Het zwembad werd net gerenoveerd, komt er zeer fraai uit te zien. Uitstekende informatie over Rome via de balie. Niets
• Willi (9/5): -
• kevin (9/5): Great accommodation and good location for the city. - The modern fixtures and fittings of the apartment. Carlo was very informative and helpful. Easy to get to the tram stop and access into the city. Make sure you are early for breakfast as the supplies tend to run out. The swimming pool opens in May.
• Iveta (9/5): - Very nice family atmosfer. Personel they where great fantastic service and provide you with all needed info about the hotel and city. Highly recomand this hotel.
• Liubov (10/5): -
• Reyhan (10/5): - Super freundliches und hilfsbereites Personal Schade war der Pool zu,aberdas wussten wir schon vorher...
• Lisa (8/5): -
• Ekaterina (10/5): Great location with easy transport to the city center, very friendly staff, and a comfortable, beautiful property with e - The property is in a great location, with easy access to the city center by tram or bus. The staff were extremely friendly and helpful, and gave us great recommendations for hidden gems nearby. The place itself is very comfortable and beautiful. With the current renovation of the swimming pool and the addition of a bar, it will be even better. we were absolutely happy with everything
• Lawrence (10/5): Loved our stay. - We loved everything. The room was clean. The bed was very comfortable. Very good free breakfast including eggs to order and espresso/cappuccino. Armando and Carlo were super helpful and friendly. The location was a little away from downtown but a couple of bus lines stopped right out front and it was a quick ride to the Colosseum and other sites. We would definitely stay at Livia Valeria again.
• Frincean (10/5): -
• Dave (7/5): Goed verblijf maar ruimte voor verbetering - Ruimtelijk opgezet Het ontbijt was niet goed geregeld. Veel was op en weinig keus
• Katja (9/5): -
• Zita (9/5): - I really liked the villa’s grounds and the apartment. The staff were kind and pleasant. Thnx. That the pool area was closed.
• Abai (10/5): - Reception is very kindly and assisted with any questions
• Claudia Graziani (10/5): -
• Patrycja (9/5): -
• nunzio (8/5): -
• Jeane (8/5): Very nice - Clean , well kept and safe pleasant Just the small things , no coffee , milk in the room just a few tea bags that were not replenished
• Vusal (10/5): - Comfort, cleanless, stuff, everything
• Aravindan (10/5): -
• Roberta (9/5): -
• KA CHUN (9/5): -
• Marianna (7/5): - Etwas weit zum ÖV Frühstück könnte Abwechslungsreicher sein.
• Jakub (10/5): -
• Soňa (10/5): -
• Jakub (10/5): - We had an amazing stay with my family over the weekend in Livia Valeria Palace. I really recommend this place to anyone wanting to have a nice time in Rome in a more quiet area, but still within a reasonable distance from the main attractions of the city and both airports. I want to highlight the cleanness and beauty of the interior in this lovely place, and above all the kindness and helpfulness of the staff. Each breakfast was great, accompanied with a stunning pastry choice. 10/10.
• Débora (10/5): -
• David (10/5): The hosts were most helpful and made the stay a pleasure. - Self contained with everything we needed for our stay.
• Dupond (9/5): Week-end entre copine - Les chambres sont spacieuses, le personnel très sympathique, le petit déjeuné très bon. Proximité de l’arrêt de tram et du bus pour aller dans le centre de Rome. N/A
• Paulina (9/5): - Przestronny pokój, czysto, wygodne łóżko i wszystkie potrzebne przybory w aneksie kuchennym, łóżeczko i pościel dla dziecka w cenie. A do tego pyszne śniadanie
• Xin (10/5): -
• Matija Jurajic (10/5): Great place to stay for long /short - Great place for long or short stay.Close to bus stops,shop,restaurants and not very far from train station and tram. Place was very clean,comfy,warm and nice.Staff at reception very friendly and helpful. We atayed with our 2 kids(toddler and 5mnth baby) I do recommend !
• Nathalie (10/5): - Very modern and clean houses, staff was super friendly
• ismael (9/5): Génial - Tous Rien à dire
• Katarina (6/5): Quiet calm stay - We really liked how quiet the hotel was! It’s not located in a busy area so that was great! Location was good too we came in March and the Ubers rides were about $10-25 USD into the city. We arrived late and organized a self check in which was super easy and convenient. They did have someone make the bed and fold the towels which was amazing. The walls were dirty. They only change the towels every three days- which would be fine except for that there were no hooks to hang up wet towels. We ended up having to hang them on the top of doors which felt dirty. They also only provided a multipurpose soap. No shampoo, conditioner or lotion.
• Joao Henrique (7/5): Um bom lugar para ficar em Roma, com funcionários muito simpáticos. - Tudo muito novo e funcionários simpáticos e educados. Box do banheiro muito pequeno! Erraram na montagem da cortina com o Black Out, trocaram o trilho de um e de outro. Nos 3 dias que acordamos lá a luz do raiar do dia incidia no nosso rosto na cama. Não deu pra acordar mais tarde porque o quarto ficava muito iluminado. Mesmo informando isso para o funcionário no primeiro dia, não resolveram. Em uma das noites, acredito que havia alguém fumando perto da entrada de ar do sistema de ventilação e então esse cheiro entrava para o quarto. Mas apesar desse incoveniente eu voltaria a me hospedar. Acredito que foram casos fortuitos. Só o box do banheiro que acredito que continuará minúsculo. O banheiro é bem grande, mas o box é desproporcional.
• Valentine (8/5): Bon hotel pour un séjour d’une durée de 5 jours - L’accueil très chaleureux et la literie très confortable. Personnel à l’écoute, de bon conseil pour les visites. Hotel facile d’accès en transports en commun. Les quelques traces d’usures présentes sur quelques équipements (fauteuils, rideaux, douche). Bruyant le matin au premier étage.
• Dean (4/5): - Great location and staff There was a horrible smell in both rooms bathrooms that they couldn’t fix.
• El Marzouki (8/5): - Tres bien
• Lisa (9/5): -
• Chloé (10/5): - Super séjour dans cet hôtel, le petit déjeuner était super, le personnel aussi! Mention spéciale à Carlo qui nous a beaucoup conseillé et très bien accueilli ! Merci
• Mishaa1986 (10/5): -
• Henk (9/5): -
• Karl (8/5): -
• Anna (10/5): -
• Matúš (10/5): Overall, very good - Very clean, modern, good location, kind personal. Missing basic things in kitchen - such as oil and and salt.. but that’s just a small detail.
• Bruno (10/5): -
• Marika (10/5): -
• Sylwia (10/5): -
• Jelizaveta (10/5): -
• anne-sophie (10/5): - Le calme de l'hôtel les chambres spacieuses et confortables le lit vraiment confortable très agréable après avoir marché toute la journée. Le petit déjeuner est correct il y a du choix. L'hôtel est à 5 min à peine de l'arrêt de tram qui mène directement dans le centre historique et a 2 stations de la gare de trastevere. Le personnel d'accueil est adorable et très serviable
• Sophie (10/5): -
• Tynasha (10/5): - Top

Photos