The Yunus Emre Camisi, 1349, the oldest building in town, from the Karamanoğlu period. The Wikipedia has some information about this dynasty: Beylik of Karaman or of Karamanoğlu (Karamanoğulları in Turkish plural), also called the Karamanid Dynasty or the Karamanids, was an Anatolian Turkish Beylik state centered in south-central Anatolia, around the present-day Karaman Province. From the 13th century until its fall in 1467, Karamanoğlu was one of the most powerful states in Anatolia.
Curiously I could speak with the imam in my own language, Dutch, as he had lived in Vlaardingen till he was 12.

On the picture: The upper part of the mihrab (prayer niche), adorned with calligraphic inscriptions in nesih script.

Nesih (or Naskh, from the Arabic: نسخ‎ ) is a specific calligraphic style for writing in the Arabic alphabet, thought to be invented around 900 AD. The root of this Arabic term nasakh-a (نسخ) means "to copy". It either refers to the fact that it replaced its predecessor, Kufic script, or that this style allows faster copying of texts. With small modifications, it is the style most commonly used for printing Arabic, Persian, Pashto and Sindhi languages.

Correspondent: J.M.Criel, Antwerpen.
Source: Wikipedia.