Hatun Rumiyoc is a paved street lined with impressive walls of polygonal stones. Towards the middle of the street, a group of children and adults dressed up as Incas seem to be laying siege to the famous 12-cornered stone, a polished monolith, cut in such a manner that it fits the other stones without requiring mortar. This 12-cornered stone is however far from remarkable and the Incas were fully capable of working with much more irregular stones. The stone was once part of Inca Roca's palace, which is now the archbishop's headquarters.