Cusco displayed some of the finest stonework in the empire, as well. The smallest stone in Qorikancha is a one-inch plug, such was the precision of the stonemasons. Another remarkable example is the 12 sided stone. By the time Pizarro arrived in Cusco in 1533, Cusco truly was the center of a thriving empire that the Inca called Tahuantinsuy (4 directions). The empire extended from Lake Tititcaca in the south to Lake Junin (currently Ecuador) in the north. Pizarro wasted no time in looting the city, completely stripping it of all gold, silver, and jewels, and destroying most of the buildings. All that remain are the foundations of several structures, the walls of which serve as the bases of Spanish cathedrals, convents, and government buildings. The destruction of Cusco not only made the Conquistadors rich, but also effectively wiped out the active Inca culture and religion, replacing it with Spanish tradition and rule.