The Conquistador who "founded" Cuzco apparently did not get the memo. "My lips to your ear, it's already there. It's been a city since Moors rule Toledo."
These are restorations of the stone portions of a cylindrical houses. These would have been topped with a conical thatched roof, though less is known about the details (e.g. pitch) of such roofs because the thatching (obviously) didn’t survive as well as the stone bases. These were located at an archeological site on the road between Cuzco and Puno.