Chaco Anasazi used beautiful masonry bricks in their structures. Edifices in Chaco Canyon date as far back as1062-1090 A.D.

Inside wall of the Great Kiva, showing the hollow rectangular firebox made of stone and an associated masonry fire screen near the center of the kiva. The function of the 2 x 1 meter vaults at Chetro Ketl is unclear, but the excavated potsherds, turquoise fragments, anthracite and calcite beads, pendants, and fragments of malachite-painted wood may have been put there as "offerings".

Wall crypts, or niches, irregularly spaced around the inside wall of the Chetro Ketl Kiva. The inside wall of the Great Kiva is also surrounded by a low masonry bench.

Although there was no clear entrance found to Chetro Ketl II, a steep ramp (like the one pictured here) composed of nine steps may have served as an entrance that descended over 2 meters, probably from an antechamber into the kiva.

T-shaped entrance from an antechamber into the kiva in Chaco Canyon 1062-1090.

Great Kiva Pueblo, Anasazi, Chaco Canyon 1062-1090, showing masonry walls and an entrance ramp.

Mansonry walls used in the construction of Chetro Ketl and the Great Kiva in Chaco Culture National Historical Park, NM.

Mansonry walls used in the construction of Chetro Ketl and the Great Kiva.