Towards the quarry's west is the "Sacred Plaza" (Holy Group), where in its western end is the " Main Temple" (Chief Temple); it is a "Wayrana" type Temple, that is, it has just three walls made with stones that have rectangular faces and perfect snug joints, with the "Imperial Inkan" wall type. The Main Temple shows seven trapezoidal niches on its central wall and five on each of the lateral ones. In front of it, about 8 meters ahead and close to the "Three Window Temple" is a huge boulder partially carved that must have been its central pillar for supporting the roof beams; today some guides call that rock "sacrificial altar". Nowadays the Main Temple has its central wall broken moving towards the northeast; archaeological works demonstrated that it is a displacement due to rain filtering. Although, some geologists suggest that it is due to a geological fault passing across this spot; they indicate even more, that there is another fault across the Sun Temple. The deity worshipped in this Main Temple is unknown, though, historians argue that it could be Wiraqocha, the Andean invisible superior god. In front of this Temple's south side-wall there is a small outcrop of carved stone that according to some authors it is a representation of the Southern Cross, which is not categorically proved. On the northern end of the "Sacred Plaza" is the " Temple of Three Windows", it only has three walls and when in use it had a two-slope roof; its stones are polygonal, and comparatively it must have been earlier or less important than the "Main Temple". The evidences indicate that this temple was originally projected for having five windows; it seems that the two end windows were walled up once the Temple was finished. In the central part of what would be the front wall is a single stone pillar that served to support the thatched roof, and on its western side is a carved stone with steps representing the three levels of the Andean World: the "Hanan-Pacha" (heaven), the "Kay-Pacha" (earth surface) and the "Ukju-Pacha" (underground). The existence of this Temple made Bingham believe that he had found the mythical "Tampu T'oqo" so this was where the Inkan Civilization was originated; all that is demonstrated wrong today. In front of the "Main Temple" there is a room having two doorways and "pirka" type rough walls that today is named as the " Priest's House"; which is probable because of the architectonic contrast with the surrounding buildings, as the quality of walls is in direct relationship to the importance of every building. Behind the "Main Temple" is a small room of excellent quality that is known as " Ornaments Chamber"; because of its location it must have kept a close complementary relationship to the Temple. Inside it, in the lower part of the rear wall there is an unusual low platform like a stone seat or couch; more over, there are two very impressive polygonal boulders in both sides of the entrance that have more that 30 angles each. Some people with very westernized or Catholic influence call this room the " Sacristy" of the Main Temple.