The structure of Cliff Palace is built by Ancient Pueblo Peoples located in Mesa Verde National Park. This is former homeland region of Pueblo Peoples actually largest cliff dwelling in North America. The cliff dwelling and park are in the southwestern corner of Colorado, in the Southwestern United States. The beautiful Tree ring dating specifies that construction and refurbishing of Cliff Palace was continuous from c. 1190 CE through c. 1260 CE, though the key portion of the building was done within a 20 year of time span. The ancient Cliff Palace was first discovered in 1888 by “Richard Wetherill” and “Charlie Mason” while out looking for stray cattle. The Cliff Palace was constructed primarily out of sandstone, mortar and wooden beams.