St. Petersburg. View on Saint Isaac´s Square from the Top of Saint Isaac´s Cathedral

Saint Isaac´s Square is a major city square sprawling between the Mariinsky Palace and Saint Isaac´s Cathedral. The square is graced by the equestrian Monument to Nicholas I. The square is surraunded by many historical buildings such as Mariinsky Palace, Hotel Astoria, and others.

Sources, related links:
Wikipedia - Saint Isaac´s Cathedral
Saint Isaac´s Cathedral - official web site