Check out Suleymaniye Cultural Details Heart. This center is really an NGO managed by volunteers who also function inside the Suleymaniye Mosque. They provide free information about Islam and the Islamic culture both inside the mosque and of their Centre. They have got an interesting presentation about Islam and mosques. https://iswordpressisfree35678.liberty-blog.com/37099179/a-simple-key-for-istanbul-wp-unveiled