Introduction to Peter and Paul Fortress: Peter Fortress is located on the right bank of the Neva River in the city center. It is a famous ancient building in St. Petersburg. The foundation stone of the fortress was laid on Rabbit Island by Peter the Great in 1703. It was later expanded several times to build this hexagonal castle. The fortress includes St. Peter and Paul's Cathedral, Bell Tower, St. Peter's Gate, Peter the Great's Boathouse, Mint, Arsenal, Kronwerk Gun Tower, Monument to the December Revolutionaries and other buildings. The most famous is St. Peter and Paul's Cathedral, which was built in 1703. It was originally made of wood and was converted into a stone cathedral on the original site from 1712 to 1733. It is an early Russian Baroque cathedral. The bell tower of the cathedral is 122 meters high. By the middle of this century, it was the tallest building in the city.