Saimbeyli, historically known as Hadjin (Armenian: Հաճըն, romanized: Hačən), is a town and district of Adana Province in present-day Turkey.

[4] This fortress, which guards the strategic road between Kayseri to the north and the Rubenid castle of Vahka to the south, stands on the junction of two valleys and two tributaries of the Seyhan River.

[5] An Armenian monastic complex dedicated to St. James is perched on the side of a tall hill at the northwest end of the village.

It stood on a 12th century foundation, but it was rebuilt in 1554 by Bishop Khatchadour[6] and was purposefully desecrated during the Adana massacres of the Armenian genocide, leaving little remains.

Violence consumed Marash and Hadjin during the Adana massacres of April 1909, when estimates of the death toll grew to exceed 5,000.

[10] An April 22 message from an American missionary in Hadjin indicated that the town was taking fire intermittently, surrounding Armenian properties had been burned, and that siege was inevitable.