Prehistoric Rock-Art Site of Pala Pinta

The Prehistoric Rock-Art Site of Pala Pinta is a rock shelter in Alijó, Portugal, in the parish of Carlão e Amieiro. The paintings cover a granite surface 12 metres long and 2.5 metres high, featuring monochromatic ochre imagery of radial forms, dots, and anthropomorphic figures. Experts date the art to the Chalcolithic period (3rd millennium BC), and researchers propose the radial motifs may represent a comet sighting, potentially the oldest human record of such an astronomical event. The site was classified as a Special Protection Zone in 2006.