It is thought to be the first found in Bulgaria. The pulpit was probably built at the end of the 4th century CE or the early 5th century during the reign of Byzantine Arcadius and coincided with the period of the christening of the Thracians in the Rhodopes area. The church foundations are laid out in the form of a single nave basilica of 16.5 m length, which is the most typical form of an early Christian temple. The pulpit is exceptionally well preserved and is richly decorated with ornaments incised on the stone, including a clearly-visible eagle with outstreached wings. It also bears five inscriptions in Greek. Perperek Knoll on Livingston Island in the South Shetland Islands, Antarctica is named after the settlement of Perperek, in connection with the Thracian holy city of Perperikon.