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
History of Corsica the imperial forces. Otto I destroyed the Lombard kingdom, restoring Corsica to nominal imperial control in 965. Its external threats mostly vanquished, a period of feudal anarchy followed as local Corsican-based nobles warred on each other and struggled for control, culminating in the transfer of the island – at the request of its population – to the papacy in 1077. The Pope yielded civic administration to Pisa in 1090, but contention between the Pisans and their rival Genoese soon engulfed Corsica. Repeated truces proved fleeting as the two naval and trading powers clashed for supremacy in the Western Mediterranean. The