This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
ClujNapoca at by Janos Szakal. CJIIaA The fortress of ClujNapoca Romania at Stamp of Janos Szakal Historu books Janos Szakal posted by Roamata public PDold Engravings of ClujNapoca Fortification of ClujNapoca in Romania