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
Corsica Herodotus and furthered by writers like Mérimée and Gregorovius, of Corsica as having been populated by Arcadians (Oenotrians and citizens of Phocaea), fierce and loyal people. During the first half of the century, the people of Corsica belonged still to the Italian cultural world: the bourgeoisie sent children to Pisa to study, official acts were enacted in Italian and most books were printed in Italian. Moreover, many islanders sympathised with the national struggle which was taking place in nearby Italy in those years: several political refugees from the peninsula, like Niccolò Tommaseo, spent years in the island, while some Corsicans,