Standing in front of the minber (pulpit) and looking north, to the main entry.
The wooden construction on the foreground of the picture is the ‘Müezzin Mahfili’ /platform for the muezzin (the man who recites the call to prayer). It dates from 1549, and stands opposite the minber (the imam's pulpit).
Apart from calling the congregation to prayer, in some mosques the muezzin stands during the worship service on his special platform and gives responses during the imam's sermon.

Correspondent: J.M.Criel, Antwerpen.
Sources: ‘Vakıf Abideler ve eski Eserler III’ - Vakıflar Genel Müdürlüğü, Ankara 1983 & Wikipedia.