Two houses situated on these plots were built in the 1740s, and in 1835-40, reconstructed by architect A.A. Montferrand - one for P.N. Demidov, another for princess Gagarina. The house No 45 consists of two wings: the single-storey wing on the right is decorated by columns and reliefs, the three-storied wing on the left is decorated with a terrace with busts in it. In 1873-74, the interiors were partly reconstructed (architect M.E. Messmacher, I.V. Strom). The decorations of a white marble staircase, Oak hall and other rooms have been preserved. In 1923-32, poet N.A. Klyuev lived in the yard wing. Currently, the department of the Union of Composers is situated in the building.