Roof of the The David L. Lawrence Convention Center, Pittsburgh, Philadelphia, USA

---

Size: 5282px × 3521px
Photo credit: © Nick Higham / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: auditorium, center, centre, conference, convention, curve, curved, david, delegate, flag, flags, futuristic, gray, grey., hall, international, knowledge, lawrence, lecture, meeting, modern, philadelphia, pittsburgh, plenary, roof, study, symposium, usa