The Mariinsky Theatre
http://content.answers.com/main/content/wp/en/thumb/d/d9/350px-The_Mariinsky_Theatre.jpg
http://www.ardani.com/images/MariinskyTheater.jpg

The Monastery of alexander nevsky
http://www.nordictravelrussia.com/p/laura.jpg

The Yusupov Palace
http://www.enlight.ru/camera/palaces/mar17_7184.jpg