The buildings inside the fortress were built during the 13th century and because of their characteristic architecture are preserved as cultural monuments.

The population of the fortress was Christian, and it had about 20 Churches (most built during the 13th century) and only one mosque, for the use of the Turkish garrison (of which there survives only a few ruins and the base of the minaret).

They contain frescoes and iconostasis painted by famous Albanian icon painters such as Onufri, Kostandin Shpataraku, Zografi Brothers and more.

[4] The castle of Berat's population was largely Christian which lead to the construction of these churches (most of them built during the 13th Century).

The frescoes from these churches are painted during the Middle Ages by many icon artists such as Onufri who is famous in Albania and has his iconography museum located in the city of Berat.