built as a residence for Emperor Paul I by architects Vincenzo Brenna and Vasili Bazhenov in 1797-1801. The castle looks different from each side, as the architects used motifs of various architectural styles such as French Classicism, Italian Renaissance and Gothic.Emperor Paul I disliked the Winter Palace where he never felt safe. Due to his personal fascination with medieval knights and his constant fear of assassination, the new royal residence was built like a castle around a small octagonal courtyard. The building with rounded corners was surrounded by the waters of the Moika River, the Fontanka River and two specially dug canals (the Church Canal and the Sunday Canal), transforming the castle area into an artificial island which could only be reached by drawbridges.Ironically, Paul I was assassinated only 40 nights after he moved into his newly built castle. He was murdered on 12 March 1801, in his own bedroom, by a group of dismissed officers