basilica
In ancient Roman architecture a large oblong type building used as hall of justice and public meeting place. The roman basilica served as a model for early Christian churches.

conventus, us
In the Roman provinces, the term referred to the meetings of the provincials in places appointed by the praetor or the proconsul of the province for the purpose of administering justice. In order to facilitate the procedure, the province was divided into districts or circuits called conventus, forum or jurisdictio. The Roman citizens living in a province under the jurisdiction of the proconsul, and accordingly had to settle any business at a conventus had to appear there.

nymphaeum, the
Originally the sacred grotto dedicated to the Nymphs. During the Roman period the Nymphaea were monumental public fountain constructions, commissioned by wealthy citizens. During the Early Byzantine period they often adorned the fora (public spaces).