Das Triest, located in a 19th century former bus station in Vienna, unveiled 49 rooms and suites in January.
The property was transformed into an art nouveau hotel in 1996 by well-known British designer Terence Conran, and the new rooms and suites were added in the adjacent Osterreich Werbung building by Wehdorn Architects.
Each accommodation features a living area, a king-size bed, wall panels created by Vienna-based artist Esther Stocker and an alcove overlooking St. Stephen's Cathedral.
Das Triest in Vienna was converted from a 19th century former bus station to a hotel in 1996.
Also new are Porta, an on-property bistro designed by Viennese studio BEHF Architects, and top-floor event spaces that can accommodate up to 140 people.
Existing eateries include Collio, Silver Bar and Alimentari, a delicatessen housed in a what was once a pharmacy.
The new accommodations bring the total number of rooms and suites to 120.