Annin's Fortifications
Vyborg, Petrovskaya Square, Fredrikshamn Gate
Annius Fortifications in Vyborg include Friedrichsgahm Gates, restored over the years. The fortification project included a crownwork with three bastions and covered redoubts. The wall's counterguard was built from granite boulders. The gates and fortifications were repeatedly repaired and restored, most recently in 2015. It is planned to create an exhibition in Cordegardy after its restoration.