<P> The Île de la Cité (French pronunciation: ​ (il də la site)) is one of two remaining natural islands in the Seine within the city of Paris (the other being the Île Saint - Louis). It is the centre of Paris and the location where the medieval city was refounded . </P> <P> The western end has held a palace since Merovingian times, and its eastern end since the same period has been consecrated to religion, especially after the 10th - century construction of a cathedral preceding today's Notre - Dame . The land between the two was, until the 1850s, largely residential and commercial, but has since been filled by the city's Prefecture de Police, Palais de Justice, Hôtel - Dieu hospital, and Tribunal de commerce . Only the westernmost and northeastern extremities of the island remain residential today, and the latter preserves some vestiges of its 16th - century canon's houses . As of 2013, the island's population was 981 . The Mémorial des Martyrs de la Déportation, a memorial to the 200,000 people deported from Vichy France to the Nazi concentration camps during the Second World War, is located at the upriver end of the island . </P>

What is the name of the island in the seine river