The building, where the House of Composers is now located, was built in the 40s of the XVIII century. A hundred years later it passed into the ownership of Auguste Montferrand, who rebuilt it and decorated the parapet with three panels depicting scenes of communication of great rulers with equally great artists. Here you can see Francis I at the deathbed of Leonardo da Vinci, the "business meeting" of Michelangelo and Paul III, Charles I, stretching his hand to Titian. The fronton of the building is decorated with bas-reliefs of the characters of Lafontaine's fables: "The Wolf and the Sheep", "The Bird and the Snake", "The Hare and the Turtle", "The Lion and the Mouse".
In 1873, the mansion was purchased by Princess Vera Fedorovna Gagarina. At that time the building also underwent some changes to the project, which was provided by the architect IV Shtrom. The interior decoration of Montferrand disappeared, but the marble staircase and the exquisite interior of the legendary Oak Hall were preserved: carved panels on the ceiling, a chic fireplace, an oak gallery, panels of a set tree. All the rest of the interior decoration of the House of Composers dates back to the 1980s.
In the property of the Union of Composers, the building appeared in the late 1940s. At the moment the staff of this organization is more than two hundred musicologists and composers. In terms of numbers, it is second only to a similar organization in Moscow. At different times at the head of the St. Petersburg Union of Composers stood such outstanding personalities as Isaak Dunaevsky, Dmitry Shostakovich, Vasily Solovyov-Sedoy, Andrei Petrov and others. Now the chairman of the organization is Grigory Korchmar.
In the House of Composers there is a Concert Hall where there are chamber evenings of classical orchestral music, numerous festivals and creative meetings. Also in the building there are training events, conferences, board meetings of the Union. In addition, the structure of the House operates a studio of electronic music, where new creations of contemporary composers of the cultural capital of Russia are born.