The excavations in the ancient Greek city of Bathonea, located in the Küçükçekmece Lake basin in the Avcılar district of Istanbul, with the discovery of underwater architectural remains of the second ancient lighthouse in Turkey after the ancient city of Patara.

The excavations in Bathonea, are being done by the Culture and Tourism Ministry and Kocaeli University under the supervision of Professor Şengül Aydıngün, aiming to reveal and preserve the historical and archaeological heritage.

The early Hittite traces found in the excavations of the Ancient City of Bathonea, where many unknown important structures of Istanbul and issues waiting to be enlightened, are brought to light, are described as the biggest discovery in the studies. With this discovery in the excavations, Hittite traces were found for the first time on the European continent.

The Bathonea ancient city also bore traces of the Thracian/Phrygian tribes, the existence of which was contested until these findings proved they migrated from the Bosporus to Anatolia 3,000 years ago.