I recently retranslated Evliya �elebi's ecphrasis in praise of this building, together with his almost entirely fictional fairy story about the origins and history of Osman Şah himself.
The passage is: Seyahatname, (MS Istanbul, Bagdat 308) VIII 238b24�VIII 239a26
Is anyone interested?
Mosque of Osman Şah, Trikala, Greece
It is very interesting, I interested to read this this translation, please, if you can, send it to me.