Inside the Firdevs Bey Mosque: the platform were women take place if they want to participate in the common prayer. It is situated on the north side of the prayer hall, above the entrance door.

The presence of such a platform in a mosque is not compulsory. The only separation between men and women is during prayers when women must stand behind the men. The platform makes things only somewhat easier (for men); the women being completely invisible for people downstairs, men will no longer be tempted to secretly peep backwards, and so will stay well focused on the ritual.

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