Chicago's history is rich and full of mystery. Construction excavation often brings that mystery to the surface.
During a survey for the Obama Presidential Center in Jackson Park, archaeologists from the Prairie Research Institute found artifacts from the 1893 World's Fair.
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The historic items found were "plaster and concrete building fragments, remnants of lighting from the City of the Future exhibition, spoons, and pieces of hotel ceramic ware," according to Architectural Digest.
The Obama Presidential Center is being designed by Tod Williams Billie Tsien. It is to be built on 20 acres where the Chicago's World Fair took place.
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If the artifacts reveal new historical information about the city, it could delay construction. If these items do hold historical significance, there will be a delay as the site gets added to the National Register of Historic Places.
It is unlikely that the artifacts will reveal new information about history. "In a number of locations, the team did find artifacts that we think are associated with the World's Fair," said Brad Koldehoff, chief archaeologist for Illinois DOT.