 Complete the following phrase:  Expansion across the meadows Neva frontage continued in the 1780s with the construction of the service wing of the Marble Palace, and the and the Saltykov Mansions. The Betskoy Mansion, now the home of the Saint-Petersburg State University of Culture and Arts, was built between 1784 and 1787 by Jean-Baptiste Vallin de la Mothe, stands on the west bank of the canal, close to the Upper Swan Bridge. The canals banks were reinforced in 1934, though a similar strengthening project planned for 1941 had to be cancelled after the 