and added to two hundred cargas of gold transported back to Cajamarca. After Francisco Pizarro finally entered Cuzco, Pedro Pizarro described what they found, "on top of a hill they [the Inca] had a very strong fort surrounded with masonry walls of stones and having two very high round towers. And in the lower part of this wall there were stones so large and thick that it seemed impossible that human hands could have set them in place...they were so close together, and so well fitted, that the point of a pin could not have been inserted in one of the joints. The whole fortress was built up in terraces and flat spaces." The numerous rooms were "filled with arms, lances, arrows, darts, clubs, bucklers and large oblong shields...there were many morions...there were also...certain stretchers in which the Lords travelled, as in litters." Pedro Pizarro described in detail storage rooms that were within the complex and filled with military equipment. The large plaza, capable of holding thousands of people, was designed for communal ceremonial activities. Several of the large structures at the site may also have been used during rituals. A similar relationship to that between Cuzco and Sacsayhuamán was replicated by the Inca in their distant colony where Santiago, Chile developed. The Inca fortress there, known as Chena, predated the Spanish colonial city. It was a ceremonial ritual site known as Huaca de Chena. The best-known zone of Sacsayhuamán includes its great plaza and its adjacent three massive terrace walls. The stones used in the construction of these terraces are among the largest used in any building in pre-Hispanic America. They display a precision of cutting and fitting that is unmatched in the Americas. The stones are so closely spaced that a single piece of paper will not fit between many of the stones. This precision, combined with the rounded corners of the blocks, the variety of their interlocking shapes, and the way the walls lean inward, is thought to have helped the ruins survive devastating earthquakes in Cuzco. The longest of the three walls is about 400 meters. They are about 6 meters tall. The estimated volume of stone is over 6,000 cubic meters. Estimates for the weight of the largest andesite block vary from 128 tonnes to almost 200 tonnes. Following the siege of Cusco, the Spaniards began to use Sacsayhuamán as a source of stones for