Montjuïc Castle built
1641 CE.
Shown on the map at 41.363°, 2.166°.
Montjuïc Castle (Catalan: Castell de Montjuïc, Spanish: Castillo de Montjuich) is an old military fortress, with roots dating back from 1640, built on top of Montjuïc hill in Barcelona, Catalonia, Spain. It currently serves as a Barcelona municipal facility.
Text from the Wikipedia article Montjuïc Castle, licensed CC BY-SA 4.0.