So-called because it is an enclosure with three large windows facing the Sun.
It constitutes one of the most beautiful constructions of Machu Picchu and the fine quality of its construction demonstrates its hierarchy.
This site presents evidence of not having been finished.
Bingham referred to this site as the Temple of the three windows and stated that he did not find anything in his excavation, however, he explained that at the foot of the three windows and at a depth of 2 to 4 feet he located a large number of decorated sherds and fragments of ceramic vessels and jars, objects thrown from the three windows as offerings to the gods.