The sculpture of lion was discovered in excavations of a complex which used to be an inn during that period, he said.
Excavations were also carried in agoras, or ancient city centers of Byzantine structures, added Arslan.
A 1,500-year-old stone oven dating back to Eastern Roman (Byzantine) period was also unveiled during the excavations in the area.
"One of the structures contained a finding which was used at that time as a cooking stove with three pots," he said.
He noted that the well-preserved stove illuminates the daily life of the Byzantine era.
Turkish archeologists have been carrying out uninterrupted excavation work in the ancient city since 1981, after the American researchers began their work in the area in the 1800s.
Assos, situated on a rocky hill overlooking the Aegean Sea in northwestern province Çanakkale, has been home to many societies for centuries, while nowadays it is a popular destination for hundreds of thousands of tourists each year with its antique theater, agora, necropolis and ancient walls.
The site, located 17 kilometers (11 miles) south of Ayvacık district, was accepted in the UNESCO Tentative List of World Heritage on April 15, 2017.
