strongly geometric exterior 1929 hoops building cast iron luxfer prism glass showroom second floor mullion segment

original 1929 refinished ornamental cast iron exterior hoops building (non-extant) facade window casing or possibly a mullion panel with a remarkable and strongly geometric repeating design motif. the thoroughly cleaned single-sided cast iron fragment was likely salvaged from the upper two floors of the building prior to demolition in the 1990's. the building (located at 529 s. wabash avenue) was designed by the the architectural firm of jenney, mundie & jensen. the luxfer prism glass company showroom occupied part of the building shortly after it was constructed. the design motifs look strikingly similar to luxfer's "geometric flower" prism tiles designed and patented by frank lloyd wright. the removal of the old green paint finish has greatly enhanced the incredibly casting detail of the fragment.