This afternoon on the University of Pennsylvania campus I went into Skirkanich Hall of the School of Engineering and Applied Science. I was attracted to the building, which I had never been in, so I decided to explore. I admired the lofty atrium just inside the entrance, which is cantilevered over the sidewalk. Down beneath street level is Berger Auditorium, where I decided to play Syrinx in a seat rather than onstage. As I left the building I discovered that the architects are Tod Williams and Billie Tsien, the team also behind the new Barnes Foundation in Philadelphia.