Five puzzles (then called "blocks") ranging from 26 to 30 pieces each, 4" to 6" H x 20" to 21" W. Buildings from the 1876 Philadelphia Exhibition portrayed are from top to bottom: Art Gallery, Machinery Hall, Horticultural Hall, Agricultural Hall, Main Building. Set comes with separate full-sized pictures of each building and original box. Solid wood. Donated to American Antiquarian Society in Worcester, MA. Thanks to a kinkly web browser, corrections were made to date and place of Exhibition.