Take advantage of the Witte’s Free Tuesdays (3-8 pm weekly) and step right up to “Texas Performers Under the Big Top,” a window into the Hertzberg Circus Collection, the nation’s oldest public archive of circus ephemera. The historical exhibit explores Texas’ role as an important stop for touring troupes and revisits the lives and times of Texan performers including El Paso’s Jack Earl the Giant and SA’s Esquivel Brothers — vaqueros in Buffalo Bill’s Wild West show circa 1883. Free; 3-8pm; The Witte Museum, 3801 Broadway, (210) 357-1900, wittemuseum.org. Check out our full online calendar of upcoming events here: calendar.sacurrent.com.