This structure, which is located on Frontinus Avenue, dates from the end of the 1st century AD and measures 6.30 m x 20.50 m.

The facade was constructed of half columns of the Doric style. The entrance is on the southern side. The site is divided in two with monolithic Doric columns.

At the base is a gutter which collects waste water, with a smaller gutter in front, for clean water.