<P> A kiva is a room used by Puebloans for religious rituals and political meetings, many of them associated with the kachina belief system . Among the modern Hopi and most other Pueblo peoples, kivas are square - walled and underground, and are used for spiritual ceremonies . </P> <P> Similar subterranean rooms are found among ruins in the American Southwest, indicating uses by the ancient peoples of the region including the ancestral Puebloans, the Mogollon, and the Hohokam . Those used by the ancient Pueblos of the Pueblo I Period and following, designated by the Pecos Classification system developed by archaeologists, were usually round and evolved from simpler pithouses . For the Ancestral Puebloans, these rooms are believed to have had a variety of functions, including domestic residence along with social and ceremonial purposes . </P>

Which of the following is not a characteristic of pueblo kivas