Willcahuain means “house of the grandson.” The site dates to between 700 and 900 AD and was likely built under the influence of the Wari culture. The main building was constructed on a platform that was partially filled with stone and earth in order to create a flat area. The house has 3 levels, each with entrances through different walls, the first west, the second south and the last east. Inside rooms are connected by passages, creating a symmetrical floor plan. The masonry of the walls is rustic stone connected by mud mortar. Eight hundred meters from Willcahuain is Ichic Willcahuain, a complex of smaller buildings in a slightly different style.