Located at the North of the Palace complex, the great Council Hall (aula regia or aula palatina in Latin) was used to house the speeches delivered by the Emperor once a year.
The dimensions of the hall (1,000 m2) were suitable to the reception of several hundreds of people at the same time:[REF] although the building has been destroyed, it is known it was 47,42 metres long, 20,76 metres large and 21 metres high [REF].