The Honore Block, Dearborn and Monroe, 1868, Chicago.
Ryerson and Burnham Archives, Art Institute of Chicago
1869 Gold Coast map showing the Catholic Cemetery, just north of Banks St and east of State Street. The occupants of the cemetery would be eventually moved to other locations, including Graceland.
It is still very common, during construction in the area, to uncover pre-Civil War era burial sites.
Note the shoreline and the existence what we now call the Viagra Triangle at Rush and State.
via Hidden Truths
Chicago Board of Trade Battery (BTB) Flag, 1862, Chicago.
During the Civil War, 150 members of the Chicago Board of Trade were mustered into service to fight for the Union Army.
Read more here: http://crossedsabers.blogspot.com/2008/10/chicago-board-of-trade-battery.html
Looking north on Dearborn from what is now Delaware, 1867, Chicago.
The church on the right is the Scottish Rite Temple, which still stands;the park on the left is Washington Square, which of course is still enjoyed by residents and visitors to the Gold Coast.