Salm Palace is a classical three-winged palace-type building on Hradčany Square. It was originally intended to be a luxury apartment building that belonged to the Schwarzenbergs, who combined it with the neighbouring Schwarzenberg Palace. In 2004, the building was taken over by the National Gallery Prague.

The Old Masters II exhibition is a continuation of the Old Masters exhibition located in the opposite Schwarzenberg Palace. The two complement each other to form a single entity, while presenting magnificent works of art in different contexts.

The exhibition Old Masters presents a selection of the most important masterpieces from the NGP collection.

The national cultural monument was designed by architect Adolf Loos and built for the family of František Müller. It houses a study and documentation centre for researchers. The Raumplan space concept was used in the construction. The interior is in the spirit of modern functionalism and classical English style.

The main mission of the centre is to promote modern Prague interwar and post-war architecture, residential culture, applied arts and lifestyle, represented in different ways in the two buildings, in close connection with two important villas - Müller and Rothmayer.

Exhibitions and various cultural events are organized in the castle grounds. There is a park adjacent to the castle and weddings are also held there. There is an exposition dedicated to history in the castle, on the 1st floor there is an exposition Crafts in order.