The Chavín civilization was centered on the site of Chavín de Huántar, the religious center of the Chavin people and the political capital. The temple is a massive flat-topped pyramid surrounded by lower platforms. It is a U-shaped plaza with a sunken circular court in the center. The inside of the temple walls are decorated with sculptures and carvings. During its heyday, Chavin de Huantar was used as a religious center for ceremonies and events, perhaps a home for an oracle. The site contains a number of major structures, including Temples A, B, C and D, and areas and buildings designated as the Major Plaza, the Circular Plaza, the Old Temple and New Temple. But the latter two designations are no longer accurate in light of recent research advances.