In the centre of modern Selḉuk lies the remains of a church & (later) castle. It is on a mound, and overlooked Ephesus harbour in ancient times. Now silted up, a fertile plain now occupies the route to the sheltered harbour, but the sea can still be seen some ten kilometres beyond the Isa Bey Mosque.seen here.
The Isa Bey Mosque is one of the most delicate examples of Seljukian architecture, built by the master Syrian architecture Ali son of Mushimish al -Damishki, between the years of 1374 and 1375. Many of the remains of the antique city were used in its construction. The Isa Bey Mosque, is one of the oldest and most impressive works of architectural art remaining from the Anatolian beyliks. It was heavily restored in 1934.