A massive blue spherical stone now hangs in the lobby of the landmarked office building 550 Madison Avenue, part of a broader project to revitalize Philip Johnson’s postmodern gem. The Olayan Group on Wednesday unveiled the renovated space, a project which included preserving the 110-foot arched entry, adding a multi-story window across from the entrance with views through to the new garden, still under construction, and the centerpiece art commission.

The Olayan Group today received the distinguished New York Landmarks Conservancy Chairman’s Award during a virtual celebration for the company’s preservation for the landmarked office tower 550 Madison.

By now, you’re probably used to a cursory glance at a letter grade as you step into a New York restaurant or bar. Later this month, you can expect to start spotting something similar in the lobbies of residential and commercial office buildings.