Even since antiquity, Penteli marble tile has been famous for its marble, which was used for the construction of the Acropolis and other buildings of ancient Athens. Penteli marble tile is flawless white with a uniform, faint yellow tint, which makes it shine with a golden hue under sunlight. The ancient quarry is protected by law, and used exclusively to obtain material for the Acropolis Restoration Project. The roadway used to transport marble blocks from the quarry to the Acropolis in antiquity is a continual downhill, and follows the natural lay of the land, with research and full documentation by the chief Acropolis restoration architect, Professor Manolis Korres, in his award-winning book "From Pentelicon to the Parthenon". A monastery is also located in the middle of the mountain, NE of city centre.