The central office building of the camp was accessed by the vestibule leading to the courtyard, which was enclosed on both sides by the ammunition storeroom (armamentaria). Having crossed the courtyard, one entered a large transverse hall (basilica) connected to the sanctuary (aedes) harbouring the legion’s insignia. Adjacent the legion’s archive (tabularium) and meeting facilities could be found. The basilica had impressive dimensions and received light from a row of windows beneath the roof.
