Atlantic Canada Theatre Site Collection of 19th Century Canadian theatre playbills.
Footlights Theatre Gallery and Gifts Extensive collection of theatre posters from shows across the globe!
KJA Hundreds of enlargeable thumbnails of historical publicity posters from Broadway, vaudeville and burlesque shows. A fantastic resource for theatre buffs, albeit a commerical website.
Library of Congress Playbill publicity posters from the American variety stage of vaudeville and popular entertainment, 1870-1920.