The plays of Plautus suggest that basilica buildings may have existed prior to Cato's building. The plays were composed between 210 and 184 BC and refer to a building that might be identified with the "Atrium Regium". Another early example is the basilica at Pompeii (late 2nd century BC). Inspiration may have come from prototypes like Athens's "Stoa Basileios" or the hypostyle hall on Delos, but the architectural form is most derived from the audience halls in the royal palaces of the Diadochi kingdoms of the Hellenistic period. These rooms were typically a high nave flanked by colonnades.