Temple of Diana, Bay
The name was attributed to the building by Neapolitan antique dealers following the discovery of marble bas-reliefs with figures of dogs and deer, as well as a marble fragment in which the name of the goddess was apparently read.
The structure looks like a large circular hall inscribed in an octagon, built in opus listatum up to the kidneys of the arches covering the windows; above it is in opus latericium up to the attack of the dome, which was ogival in shape and which is now sectioned, made with progressively projecting rings, built with splinters of tuff and bricks.
The rotunda could be identified with a natatio, in relation to the presence on site of natural hot and cold thermal springs.
