Billie Tsien, AIA, principal of Tod Williams Billie Tsien Architects, describes one of her favorite spaces, the interior of the Pantheon, and the moving experience she had there that brought tears to her eyes."What's Next" is an ongoing discussion about the ways technology, the economy, and other factors are transforming architects relationships with their jobs. Each week, different thought leaders in and around the profession will share their insights about the future of the architecture workplace.