Dörttepeler Tumulus located in the graveyard within Elbeyli Municipality. There are two monumental tombs in the Tumulus. This one nearby the road has two kline on both sides of the rctangular grave room A narrow passageway - dromos leads to the grave room descended the four stairs. The other tomb in a grave ris made of marble.
Sources:
- Mustafa Şahin, Doğan Yavas, Recep Okcu, Derya Şahin, İznik Yüzey Araştırması 2006, in: 25. Araştırma Sonuçları Toplantısı [2007] 1. Cilt