Marc Chagall's mosaic occupies a section of the First National Plaza
at Dearborn and Monroe Streets.
It's size and shape (70 feet long by 14 feet high by 10 feet wide) have earned it the nickname of "the boxcar mosaic".
The design which wraps around all four sides of the rectangle was a gift to the city by the artist and the actual construction of it was privately funded. The colorful glass and stone used to construct it came from Italy, France, Norway, Belgium, and Israel. Chagall was present when the mosaic was dedicated on September 27, 1974.