Board of Trade building vault to public for first time

October 20, 2013 2:28:27 PM PDT
The public got a rare opportunity this weekend to see the vault at the Chicago Board of Trade building.

Never in the building's 83-year history has it been opened to the public until now.

Sunday's unveiling was in conjunction with the Chicago Architecture Foundation's third annual Open House Chicago.

The open house is a free event that showcases many of the city's architectural gems.