The Winter Palace in St. Petersburg, Russia was the official residence of Russian monarchs from 1732 to 1917. It is Situated between the Palace Embankment and the Palace Square.
You can look at SketchUp model of The Winter Palace. 3D model is located at this link: http://sketchup.google.com/3dwarehouse/details?mid=6d399a19103c75b7f63c51170ab64ef3&prevstart=0
