It marks the official center of Madrid. Search for the “km 0” plaque on the bottom, that is where all distances in Spain are calculated from. Without having a subpoena, voluntary compliance over the part of your Internet Provider Service provider, or more data from a 3rd party, information https://congresses-in-madrid-ifem25556.timeblog.net/71537055/the-best-side-of-hotels-and-transport-to-madrid