Corsica and killings culminated in the assassination of Prefect Claude Érignac in 1998. In 2013, Corsica hosted the first three stages of the 100th Tour de France, which passed through the island for the first time in the event's 110-year history. Corsica was formed about 250 million years ago with the uplift of a granite backbone on the western side. About 50 million years ago sedimentary rock was pressed against this granite, forming the schists of the eastern side. It is the most mountainous island in the Mediterranean, a "mountain in the sea". It is also the fourth largest island in
Ancient Corsica a new problem with the Saracens, who ravaged the coasts of the island frequently. The Lombards also returned to the island, to fight against the Saracens. The conflict with the Saracens, which also drew in other significant powers that often laid claim to Corsica or a part thereof, dominated the fortunes of the island for several centuries. This period is almost unrecorded, except in the Chronicles of Giovanni della Grossa (1388-1464), which were written much later and are heavily infused with legends. Source material and research on the island are both sparse and as a result there have been few