The Vakıf Kâtibi Odası. Or: The room of the bookkeeper of the Vakıf that was connected to the Mevlana Tekkesi/Convent.

‘Vakıf’ = Islamic charitable foundation that will either donate funds and support to other organizations, or provide the source of funding for its own charitable purposes.

Correspondent: J.M.Criel, Antwerpen.
Sources: Vikipedia / Wikipedia .