Rageh Omaar explains how the collapse of this Islamic super-power following the first World War left problems that still exist in Europe and the Middle East today. From its capital in Istanbul the Ottoman Empire matched the glories of Ancient Rome. Yet its achievements have been largely lost in the trauma of its last few years. Brutality, massacres and the carve-up of former Ottoman lands created a legacy of tension and conflict that continue to this day. The heartland of the former empire - modern day Turkey - turned its back on its Islamic, Ottoman past. It underwent a social revolution led by military commander and secular visionary Mustafa Kemal-Ataturk. So why is Ottomanism back on the political agenda? And why are many politicians in the West hoping that Turkey can provide a role model as a modern, Islamic democracy?