Pyramids and Ceremonial Centers in Mesoamerica and China: Were They Oriented Using a Magnetic Compass?

The arguments based on our own measurements in situ or based on analysis of satellite images and on worldwide paleomagnetic data available to date for relevant time intervals are gathered and presented to claim that many pyramids and other important buildings in Mesoamerica (Olmécs, Maya...) and in China (Xi’an...) were oriented by means of a magnetic compass.