<email@example.com> contributed this information :
"The Stock Exchange was demolished in 1972. That was protested
for years. Even the city council lobbied the developer who owned
land. There was talk the building would become a government
building but it never happened. The interior of the trading floor
building is in the Art Institute now."
Appears in this Rand McNally 1893 3-D map at the Univ. of Illinois at Chicago: