The Esrefoglu Cami in Beysehir, erected in 1299-1300, is an exzellent example of a so-called "Holzsäulen-Moschee" (wooden column mosque), a type of mosque which has been thoroughly researched by Katharina Otto-Dorn in the 1950s. Further examples can be found, e.g. in Afyon, Ankara. Ayas, Kasaba Köy and Sivrihisar, see Archive Katharina Otto-Dorn in Historical Images.