Portal:Philadelphia/Did you know?/October 2011
... that the Main Exhibition Building of the Centennial Exposition of 1876, a temporary structure, was the largest building in the world by area, enclosing 21.5 acres (8.7 ha)?
... that the Main Exhibition Building of the Centennial Exposition of 1876, a temporary structure, was the largest building in the world by area, enclosing 21.5 acres (8.7 ha)?