Is the tower of the church of San Nicolás, found in the heart of the old Madrid, the minaret of one of the six mosques that were in the Islamic Madrid? It's possible. No doubt that, at least, it's a Mudejar tower built by Muslim masters under the new christian rulers.

In La Latina, today one of the liveliest quarters, was the Mudejar area: the place where the Muslims moved to live after the conquest of Alfonso VI in 1085. There was an Islamic Court, hammam, mosques, a wedding house... The name of some streets recall that past.

We refer to the system of canals to collect underground aquifers that the Arabs brought from Persia to Mayrit in the 9th century. The 124 kilometers of water canals estimated to remain under the asphalt in Madrid were in operation until the late 19th century.