To the east is an apsidal hall, often identified with the temple itself, in which was found the famous mosaic with scenes from the Nile, relaid in the Palazzo Barberini-Colonna in Palestrina on the uppermost terrace (now a National Museum).
=== Tempelj Fortuna Primigenia ===Praeneste je predvsem znan po svojem templju Fortuna Primigenia, povezanem z orakljem znanim kot sklop Praenestine ("sortes praenestinae").