The last building from Williams and Tsien that I’ll cover is the Obama Presidential Center in Chicago, and this very well may be the best one so far.  Much like the other buildings, it has the squared stones covering the entire exterior of the structure, however this time, about a quarter of the exterior is covered with reflecting tiles shining bright at night. Next, the shape of the building is unlike anything I’ve ever seen before; it’s somewhat of a three-dimensional hexagon. I also appreciate how the nature surrounding the building allows people to walk around, soak in, and enjoy the sight that is the Obama Presidential Center.