Chicago Cultural Center. I’m guessing the 4 non-astrological signs represent season, but just a guess.
More on the Tiffany dome:
The restoration of the Chicago Cultural Center’s Louis Comfort Tiffany art glass dome — the largest Tiffany glass dome in the world — was completed in 2008 with awe-inspiring results.
This project restored the dome to Tiffany’s original vision. Now the dome can be seen as it was in 1897, when the building opened as the first Chicago Public Library, and the room now named Preston Bradley Hall was where people picked up the books they had requested. The concrete and copper exterior dome that had been added over the art glass dome during the 1930s was removed. Natural light shines through the glass, changing the subtle colors of the restored glass minute-by-minute.
Approximately 38 feet in diameter, the Tiffany dome spans more than 1,000 square feet. It contains some 30,000 pieces of glass in 243 sections held within an ornate cast iron frame. In order to restore the glass, the panels were removed from the framework and taken to a world-renowned glass studio. The panels were disassembled so that each piece of glass could be cleaned by hand and repaired as necessary, then reassembled with new leading.
The concrete and copper exterior dome was removed, and replaced by one that is translucent and energy-efficient. The reintroduction of natural light into Preston Bradley Hall reduces the need for artificial lighting, which reduces electrical costs.