The Ahi Evran Mosque and its Islamic Complex, designed for conserving the tradition of the Ahi community, are rooted back to the 12^th century and have an important place notably in Kirsehir and the history of Anatolia.
Ahilik Organization is an institution of art, trade, solidarity and assistance that has developed and spread among the Turks.
It defends business ethics, protects the capital, workforce, science, and business principles. It has similar aspects to today's cooperative unionism, social security, quality and price control system.
The building was built over the tomb in 1450. It was expanded and a mosque was added to the structure in 1561.  The building has been the spiritual center of Turkish tanners and craftsmen during Ottoman Empire.

Source:

https://kirsehir.ktb.gov.tr/TR-195631/ahi-evran-i-veli.html