In 1853, he broke ground for the Cooper Union for the Advancement of Science and Art, a private college in New York, completing the building in 1859 at the cost of $600,000. Cooper Union offered open-admission night classes available to men and women alike, and attracted 2,000 responses to its initial offering, although 600 later dropped out. The classes were non-sectarian, and women were treated equally with men, although 95% of the students were male. Cooper started a Women's School of Design, which offered daytime courses in engraving, lithography, painting on china and drawing.