Demirli Masjid is located in the İçerişehir district of Beyşehir, Konya. This little masjid, almost hidden from sight, stands as a quiet testament to the region's rich history.
Subasi Masjid is located on the west side of Eşrefoğlu Mosque and at a distance of approximately 250 m. In historical documents, the name of the masjid is usually called as Demirli Masjid, and the term Subasi Masjid is rarely used.
According to its inscription, the building, which was built by Subasi Şerafettin Emir Ahmet Bey in 1314, who was the Governor of Beyşehir during the time of Eşrefoğlu Bey Mübarizüddin Mehmed Bey, has served for centuries since this date.
The mosque, which was closed to worship in 1933, became a ruin after a while, its exquisite tiles were looted and some of them were smuggled abroad. A piece of tile inscription belonging to the mosque is exhibited in the Turkish Construction and Art Works Museum in Şehzadebaşı, Fatih district in Istanbul.