In the center of the town of Serres and quite deep below street level, is the splendid old Metropolitan Church of Agioi Theodoroi.
According to what some say, it was built on the ruins of an ancient temple. The temple was built in the year 1224 AD by the Despot of Epirus Theodorus Angelos Komnenos, in memory of his great victory over the Franks, just outside the city. We have the first mention of the Old Metropolis in a gold bullion of Andronikos the Elder in 1321 AD. It is described in detail by the orator Theodoros Pediasimos of Serres in his famous essay. << Expression about the Sacred southern long wall of Fera (i.e. Serres)>> (14th century). Brick inscription on the southern long wall of the temple, testifies that the wall was torn down and rebuilt in 1727.
The church of Agioi Theodoroi is best known for its famous mosaics, of which, after the fire of 1913, only the one in which the Apostle Andrew is depicted and the hands of the Apostle Luke can be seen. The main church is a three-aisled Basilica, divided into three aisles by two rows of colonnades.
This historic temple underwent many repairs and renovations over the years, which changed its original form. During the great fire of 1913 it was almost completely burned, while its restoration was done later by the Archaeological Service.
The church celebrates on the first Saturday of Great Lent, when the procession of Agia Kara and the icon of Saints Theodoroi (Tyrone and Stratilatos) takes place.