This seems to have been some sort of covered square. It was named after the adjacent republican tomb. There is no indication as to the function (a periodic market?). The roof was supported by rows of brick piers. In the back part is a small courtyard. It was built in the Hadrianic period (red brick piers of the facade, yellow brick piers in the interior). One may compare the loggias I,V,2 and I,VI,1 to the north of the Capitolium.