A rendering of the glass pedestrian sky bridge on 21st St. and Fifth. Ave. ( Andrew Rugge/Perkins Eastman) Simons Foundation Proposes $40M Sky Bridge and Rooftop Center in Flatiron District The Simons Foundation in partnership with the architectural firm Perkins Eastman, wants to install a $40 million glass pedestrian... Home 13 Dec 2023 | 11:48