If I appear certain that in your visit to Madrid you have not visited the Centro de Arte 2 de mayo (CA2M), it´s because it is located in the town of Móstoles, about 18 Kms. southwest of Madrid. Móstoles is nowadays, basically, a suburb of Madrid and is best known for having formally declared war on France on the 2nd May, 1808, following the popular uprising of the people of Madrid against the troops of Napoleon. CA2M is well suited for "installation art" and is currently showing: Pop Politics: Activism at 33 Revolutions and works by the Turkish artisit Halil Altindere.
A tip from one of the works by Altindere shown below: Some of the carpets sold in bazars in Turkey are laid out in the sun to wear down the colours so that they appear old and are sold as antiques.