Complex sentence: The Ottoman capital Constaninople was Europes largest city, and the worlds most important religious citys Mekka, Medina, Jersusalem and Nasareth was all under Ottoman rule.
Split into simpler sentences: The Ottoman capital Constaninople was Europes largest city. The most important religious citys such as Mekka, Medina, Jersusalem, Nasareth was all under Ottoman rule.