That’s the place - former home of the Philadelphia Orchestra, which now resides down the street a bit at the Kimmel Center for the Performing Arts - sleek, modern, but not nearly as classy as the Academy.....
Adore the Academy, and have spent many, many glorious hours there over the years. But I also love the Kimmel auditorium. It really does deliver beautiful sound, and for a large place, is surprisingly intimate, probably because the acoustics are so immediate no matter where you are sitting. Both are treasures.