I'll start asking you about a city in steps, exposed to the sirocco

I'll start asking you about a city in steps, exposed to the sirocco, in a crescent-shaped gulf. Now I will tell you some of the wonders it contains: a glass pool as high as a cathedral to follow the swimming and flight of the swallow fish and extract auspices; A palm tree that plays the harp with its leaves in the wind; a square surrounded by a horseshoe-shaped marble table, with the tablecloth also made of marble, seasoned with delicacies and drinks all made of marble