It marks the official center of Madrid. Hunt for the “km 0” plaque on the ground, that's where all distances in Spain are measured from. You are able to see the one string quartet of Stradivarius instruments in the world, and also the Royal Armoury that features the private https://emilianospiat.bloguetechno.com/an-unbiased-view-of-what-you-need-to-exhibit-and-how-to-exhibit-at-ifema-madrid-70869823