Archaeologists turned up remnants of the World’s Columbian Exposition of 1893, the fabled White City that drew millions of visitors to Chicago’s Jackson Park, as they scoured the site of the Obama Presidential Center and nearby parkland as part of the federal review of plans for the proposed complex.

Among the artifacts are pieces of fair buildings — including red fragments that could be from one of the fair’s most notable structures, the multicolored Transportation Building by architect Louis Sullivan — and shards of cups and saucers that bear the mark of Chase and Sanborn, the fair’s official coffee supplier.

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