Theatre Genesis was an off-off-Broadway theater founded in 1964 by Ralph Cook. Located in the historic St. Mark's Church in-the-Bowery in the East Village of Manhattan, it produced the work of new American playwrights, including Lanford Wilson, , Murray Mednick, Leonard Melfi, Walter Hadler, and Sam Shepard. Theatre Genesis is often credited as one of the original off-off-Broadway theaters, along with Joe Cino's Caffe Cino, Ellen Stewart's La MaMa Experimental Theatre Club, and Judson Poets Theatre.