St. Isaac's Cathedral is the forth largest domed cathedral in the world, after the Cathedral of St. Peter in Rome, the Cathedral of St. Paul in London and the Cathedral of St. Maria in Florence. St. Isaac's Cathedral, which is 101.5 meters high and has the area of 4 thousand square meters, can hold up to 12 thousand people. The interior decor of the cathedral features an abundant use of paintings, mosaic works and sculptures made by well-known Russian artists and sculptors, such as Bryullov, Klodt, Pimenov and others.
