https://en.wikipedia.org/wiki/Sacsayhuam%C3%A1n
Saqsaywaman,[1][2] which can be spelled many different ways [3] (possibly from Quechua language, waman falcon[4] or variable hawk)[5], is a citadel on the northern outskirts of the city of Cusco, Peru, the historic capital of the Inca Empire. Sections were first built by the Killke culture about 1100; they had occupied the area since 900. The complex was expanded and added to by the Inca from the 13th century; they built dry stone walls constructed of huge stones. The workers carefully cut the boulders to fit them together tightly without mortar. The site is at an altitude of 3,701 m (12,142 ft).
In 1983, Cusco and Sacsayhuamán together were added to the UNESCO World Heritage List for recognition and protection.
