Altstadt, Kirchengasse, Vienna
Altstadt.at
This five-floor hotel is dripping with art from the collection of owner Otto E Wiesenthal. Pieces by Annie Leibowitz, Andy Warhol and Gilbert & George adorn the walls, along with hundreds of others artists. Galleries, including the Leopold Museum (with works by Klimt and Schiele) and Mumok (museum of modern art), are close by. Doubles from €155.

Tsitouras Collection, Santorini, Greece
Tsitouras.com
A ceramic by Picasso (Three Fish in Relief) is at the centre of this hotel's extensive 4,000-strong art collection comprising paintings, sculpture and furniture. Owner Dimitris Tsitouras created this hotel in a former schoolhouse surrounded by other houses to host his art collection and accommodate friends, who suggested he turn it into a hotel. Doubles from €356.

Mandarin Oriental Boston, US
Mandarinorientalboston. com
This hotel has more than 35 pieces of museum-quality art, including dozens of paintings and more than 10 sculptures. They start at the entrance where post-war American painter Frank Stella brings rich colour with abstract works (The Whale As A Dish and Moby Dick). A piece by David Hockney (The Deux) is in the lobby. Doubles from €470.