The museum is seamlessly integrated into the urban context, unfolding its interconnecting shapes of stone, glass and titanium on a 32,500-square-meter site along the Nervión River in the old industrial heart of the city; while modest from street level, it is most impressive when viewed from the river. Eleven thousand square meters of exhibition space are distributed over nineteen galleries, ten of which follow a classic orthogonal plan that can be identified from the exterior by their stone finishes. The remaining nine galleries are irregularly shaped and can be identified from the outside by their swirling organic forms and titanium cladding. The largest gallery measures 30 meters wide and 130 meters long. Since 2005, it has housed Richard Serra's monumental installation "The Matter of Time".