The re-organisation of Île-de-France in 1968 and the division of Corsica in 1975 added six more departments, raising the total in Metropolitan France to 96. By 2011, when the overseas collectivity of Mayotte became a department, joining the earlier overseas departments of the Republic (all created in 1946) – French Guiana, Guadeloupe, Martinique and Réunion – the total number of departments in the French Republic had become 101. In 2015, the Urban Community of Lyon was split from Rhône to form the Métropole de Lyon, a "sui generis" entity, with the powers of both an intercommunality and those of a department on its territory, formally classified as a "territorial collectivity with particular status" () and as such not belonging to any department. As of 2019, Corse-du-Sud and Haute-Corse are still administrative departments, although they no longer have the status of departmental "territorial collectivities": region and department functions have been managed by a "single territorial collectivity" since 2018.