Episcopal Basilica, Sandanski, Early Christian basilica in Sandanski, Bulgaria.

The Episcopal Basilica in Sandanski is a fourth- to fifth-century church within a larger episcopal complex that also includes a baptistery, an atrium and a martyrium with a sacred spring. Its plan, building phases and rich stone, fresco and mosaic decoration were uncovered by excavations from 1989 onward; the complex belongs to the town's Archaeological Museum.

The basilica was built in the fourth century during Christianity's global expansion and combines late Roman architectural elements with boulder foundations and brick banding. The construction method with alternating materials shows the regional building style of early Byzantine times.

The basilica is also called the Basilica of Anthem, after a donor inscription found reused on the back of a gladiator announcement plaque. The 12 fragments, once set in the baptistery wall, record Anthem's works for the city and compare his church to Solomon's Temple.

The site is located about one kilometer from central Sandanski and is easily accessible with parking nearby. Visitors should wear sturdy shoes as the ancient floor surfaces are uneven, and it is wise to allow time to explore the different levels and chambers.

In 2012, during the 22nd excavation season, archaeologists uncovered a martyrium with a sacred spring in the northwest part of the complex — a room where a saint was buried or relics were kept, making it the holiest spot in the early Christian city that preceded Sandanski.