(1893) Columbian Exposition Machinery Hall Medal Grades NG. To be considered in the same light as the Crystal Palace, the epitome of monumentality, was the biggest compliment any building could receive in the late nineteenth century. With its annex, Machinery Hall covered an area of 558,440 square feet, four times the space of St. Peter's in Rome (Bruce, 150). It demonstrated to the world that the United States had become a world power. It site in Fairmount Park, was considered the "largest and finest urban park in America" (Mass, 16). Like the Crystal Palace, Machinery Hall displayed large glazed areas, fashioned after those of greenhouses. Machinery Hall was considered a great step up from the Crystal Palace because of its larger size and added amenities which include, "rolling chairs," "telegraph offices," and a restaurant, which offered fifty-cent dinners. There was more vast space indoor and other conveniences to avoid the ventilation problems encountered from its predecessor, windows in Machinery Hall were operable. Louvre ventilators along the avenues and aisles were meant to lessen any discomfort created from a mainly glazed structure (Trout, 96).