The first attraction we visited during our tour was the "Church on Spilled Blood". It is one of the main sights of Saint Petersburg and resembles the famous St. Basil's Cathedral in Moscow. It is built on the site where Emperor Alexander II was assassinated. The church contains the largest amount of usage of mosaic in the world. All the walls and ceilings inside the church are covered in mosaic with figures and images being created utilizing the same.The church got severely damaged during the Russian revolution and reopened in 1997 after restoring it.