The Early Christian Great Basilica (or Bishop’s Basilica) is located in the center of the ancient city of Philipopolis, which is itself in the downtown of today’s Plovdiv in Southern Bulgaria. It was discovered in 1982 by a team of archaeologists led by Elena Kisyakova. The excavated remains of the Great Basilica were fenced off as part of conservation efforts but have not been excavated further ever since. Back in 2002, Plovdiv Municipality sold the property to a private firm even though it contained a formally recognized monument of culture. As a result, once the scandalous deal unraveled, it took the municipality and the central government seven years of court trials to regain the ownership of the Great Basilica site. The Philipopolis Bishop’s Basilica is impressive in size – its length totals 86.3 meters (the combined length of its naos with the apse is 56.5 meters), and its width is estimated to be 38.5 meters. The entire floor of the three-nave basilica is paved with unique Early Christian mosaics covering a total area of 700 square meters. The mosaic floors were created in two construction stages. The color mosaics feature primarily geometric motifs and images of birds typical of the second quarter of the 5th century. About 70 different species of birds have been identified, some of which appear to be unknown to contemporary ornithology. Based on the mosaics, the Early Christian Bishop’s Basilica in the ancient city of Philipopolis is dated back to the first half of the 5th century BC, the Late Roman – Early Byzantine period. It was destroyed in the middle of the 6th century, possibly during a barbarian invasions. It was built on the foundations of an earlier building of similar size and potentially with similar functions.