The Piquillacta Archaeological Site is one of the most famous and best preserved pre-Inca sites of the ancient cities that existed in the Peruvian territory, which left many ancient human settlements in Peru; each with specific knowledge and technologies, which then contributed to the establishment of the largest empire in the Western Hemisphere, the Inca Empire.
The most important structure of the Piquillacta archaeological site is the Raqchi Temple of Wiracocha (1438-1532), a huge rectangular two-story structure that measures 92 meters long by 25.5 wide. The structure is composed of a central adobe wall between 18 and 20 meters high, with an andesite stone base. It has windows and doors, it is flanked on both sides by a row of 11 circular columns with the lower part in stone and the upper part in mud. Before its destruction by the Spaniards, the temple had what is believed, the largest ceiling in the Inca Empire, having its cusp in the central wall that extends over the columns and about 25 meters (82 feet) beyond each side. The great proportions of the temple, and its prominence on the site explain why the entire complex is also referred to as the Raqchi Temple of Wiracocha.
Most of the Inca structures are enclosed by large pyramidal walls, however in Raqchi archaeological site there is a court with eight rectangular buildings surrounded by a large courtyard that was probably a tambo, a lodging house for travelers.