The Seward Park Campus is a "vertical campus" of the New York City Department of Education located at 350 Grand Street at the corner of Essex Street, in the Lower East Side/Cooperative Village neighborhoods of Manhattan, New York City. It was the location of the former Seward Park High School, a now-closed comprehensive high school.

The Ludlow Street Jail was New York City's Federal prison, located on Ludlow Street and Broome Street in Manhattan. Some prisoners, such as soldiers, were held there temporarily awaiting extradition to other jurisdictions, but most of the inmates were debtors imprisoned by their creditors. Seward Park Campus now sits on the site of the jail.