Real Casa de Correos

The Real Casa de Correos is a building in the southern part of the Puerta del Sol in Madrid (Spain). Its construction dates back to the end of the second half of the eighteenth century, and is the oldest building in the Puerta del Sol. The best known of its architecture is the clock that exist in a tower built on its roof. In each night of Dec. 31 the clock is the main protagonist. Due to the chimes that mark the ritual of the twelve grapes (one sound each 3 secunds).