The existing building of the former Hypoteční banka Království českého (Mortgage Bank of the Czech Kingdom) is a Neo-Renaissance building on the corner of Opletalova and Jindřišská (streets). Aside from the guest rooms, we designed an Antique spa, saunas, a fitness centre, and conference rooms in the area of previously vaulted storage rooms compensating for the basement. There is a reception lobby, a restaurant, a VIP cigar room, and a shop on the 1st floor. The original building is extended by a new reinforced concrete structure in the internal block - two basements (technology plants and a garage) and six aboveground storeys (congresses rooms, another restaurant, and guest rooms). A complicated structural situation was solved by designing a basement under the building’s historical part while preserving these listed ones. The historical facade was restored and renovated; original colours were used. The extension (the same as the new access to the hotel and the congress areas for the physically challenged) is modern with glass panels decorated with a pattern of green and red leaves (serigraphy) fixed in front of the outer wall. A grand awning, gold-plated at the bottom surface, is placed above the new glazed block installed in front of the entrance leading to the congress areas.