Ground Zero has become a place of contending ideas about patriotic pride, public and private mourning, and spiritual inspiration. We will visit its eleven principal memorials and consider them as sacred and public space, and sources of private grief and memory. Tour led by Cal Snyder, Marine Corps veteran and author of Out of fire and Valor: The War Memorials of New York City. $15 (members, students, educators, seniors $12)To reserve tickets, call (212) 485-9205. Charge your order to Visa, Mastercard or American Express. Advance payment is required to guarantee a spot.