Igreja de São Demétrio (Hagios Demetrios), Tessalônica

The Hagios Demetrios Church, a UNESCO World Heritage Site, is a beautiful place to visit. Originally constructed in the 4th century, it has undergone several renovations and restorations over the years.

The church is renowned for its Byzantine architecture and mosaics that depict religious scenes and narratives. If you're interested in learning about the Byzantine Empire, don't miss this church off your itinerary.

The founder of the church / city is also buried in this church and is one of the most visited sights in the city.

The church of Hagios Demetrios is a church dedicated to St. Early Byzantine church consecrated to Demetrios of Thessaloniki. It is located at the foot of the hill of the upper town near the old market and is dedicated to this early Christian saint, one of the most important saints of the Greek Orthodox Church.The first small church, according to some scholars, was built in the early 4th century on the site of a Roman bath complex. A century later, a three-aisled basilica followed, which was damaged several times by fire and earthquakes.In the years 629 to 634 it was rebuilt as a five-aisled basilica.In Ottoman times, from 1493 to 1912, the church was used as a mosque and was named Kasımiye Camii in Turkish.The great city fire of 1917 led to the destruction of the roofs and the upper wall sections.Source: Wikipedia