The Senate and Synod Building, a monument of Saint Petersburg architecture, was originally designed for two administrative bodies of the Russian Empire: the Senate and the Most Holy Governing Synod. The building proved to be the last major work by architect Carlo Rossi. Since May 2008, one of the wings of the building has been accommodating the key departments of the Constitutional Court of the Russian Federation. In the other wing of the building, the Boris Yeltsin Presidential Library is located since May 2009.