Take a look at Suleymaniye Cultural Info Heart. This Middle is undoubtedly an NGO managed by volunteers who also operate inside the Suleymaniye Mosque. They provide free details about Islam plus the Islamic culture equally In the mosque and in their Centre. They've an interesting presentation about Islam and mosques. https://istanbul-personal-portfol09133.wikipublicity.com/7123072/a_secret_weapon_for_is_wordpress_is_free