A millennium ago, the Pueblo peoples were constructing incredible monuments and cities throughout the US Southwest. Among the most impressive structures they left behind is called the Sun Temple, in what is now Colorado's Mesa Verde National Park. Probably the location for meetings and ceremonies, the Sun Temple is an enormous D-shaped building with walls that were once 11-15 feet high. Now, an applied mathematician has discovered something intriguing about the proportions used to lay out the temple and its internal structures.

https://arstechnica.com/science/2017/01/evidence-that-an-ancient-pueblo-site-was-built-out-of-golden-rectangles/