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.