apart from the 17th-century defensive towers and walls, the surviving buildings include the katholikon (main church), the neoclassical cathedral of the holy trinity (1833-1838), the baroque gate church and belltower of st simeon stylites (1681, 1732), a group of 19th-century dwellings for monks and the father superior, and the extensive modern residence of the holy synod and the patriarch (1988). right next door is the large parish , built in 1832-1837 to neoclassical designs by fyodor shestakov.