Built in 13th century, the Roman Catholic Cathedral is considered to be an important monument of early Transylvanian medieval architecture.
It harmoniously combines Gothic and Roman style elements.
The establishment was meant to be a three Trinitarian three semicircular absides transept. Undoubtedly, the most important early Transylvanian Renaissance building is "Lazo" Chapel situated on the northern side of the Cathedral. The Chapel has a late gothic pointed arch.
The keystone is decorated with blazons of some Transylvanian personalities.
Inside the cathedral there is Iancu of Hunedoara`s sarcophagus next to those of his elder son Ladislau (situated in the lateral southern nave), of Queen Isabella and of son, Ioan Sigismund (situated in the opposite lateral nave).