Read and complete the sentence with the correct part.

By 1703 the lands ...

• had been conquered by the Neva River.
• fighting the Northern War against Sweden.
• as the day of the birth of St. Petersburg.
• that are located at the corners.
• the joint plan of Peter I and French engineer Joseph-Gaspard Lambert de Guerin.
• has been a part of the Museum of the History of St. Petersburg.
• is one of the main symbols of the city.
• was designed by D. Trezzini, has remained since the time of Peter I.
• the history of the fortress.
• was completed after the death of the emperor, in 1733.