The Sinagua culture refers to a prehistoric Native American group that inhabited the northern regions of present-day Arizona from around 500 to 1425 CE. They are known for their distinctive adobe dwellings, often built into cliffs or on mesas, which provided protection from the elements and enemies. The Sinagua people practiced agriculture, growing crops like corn, beans, and squash, and they also engaged in trade with neighboring cultures. Archaeological sites, such as Walnut Canyon and Montezuma Castle, showcase their impressive stone masonry and unique pottery styles. The Sinagua culture is believed to have declined due to environmental changes and resource depletion, leading to their eventual migration to other areas.