The fortress's architectural style is characterized by the distinct Peter and Paul Cathedral, which features a tall, slender golden spire and a Baroque design. The cathedral serves as the final resting place for many members of the Russian imperial family, including Peter the Great himself.

Cathedral: The Peter and Paul Cathedral within the fortress is one of its most notable features. It houses the tombs of several Russian emperors and empresses, including Peter the Great, Catherine the Great, and Nicholas II, the last Russian tsar.

Defensive Structures: The fortress consists of several bastions and defensive structures, each with its own name and history. The most famous is the Naryshkin Bastion, which housed the political prison where many notable figures were imprisoned.

Political Prison: The Peter and Paul Fortress was used as a political prison for dissenters and political opponents of the Russian imperial government. Many famous individuals, including writer Fyodor Dostoevsky, were incarcerated there.

Today, the Peter and Paul Fortress is a popular tourist attraction. Visitors can explore the historic buildings, walk along the fortress walls, visit the cathedral, and enjoy beautiful views of the Neva River.