The Pueblo II Period (AD 900 to AD 1150) was the second pueblo period of the Ancestral Puebloans of the Four Corners region of the American southwest. During this period people lived in dwellings made of stone and mortar, enjoyed communal activities in kivas, built towers and dams for water conservation, and implemented milling bins for processing maize. Communities with low-yield farms traded pottery with other settlements for maize.