What materials compose Roman lighthouses?

title: 'A ROMAN PHAROS. (From a Medal in the D'Estrtes' Collection.}'

The Roman light-tower at Dover was made of tufa, concrete, and red tile-brick[1].

The Tour d'Ordre at Boulogne was built from gray and yellow stones and tile-red bricks[1]. It is also mentioned that the courses of the Pharos of Alexandria were united by molten lead[1].


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