Archaeologist Henry D. Wallace discusses a sudden burst in cultural development, such as ritual architecture, ceremonies and ball courts, that took place around A.D. 800, from 6 to 8:30 p.m., Thursday, Sept. 15. Free. Dinner is available from the menu. Reservations are due by 5 p.m., Wednesday, Sept. 14. Call 798-1201, or email firstname.lastname@example.org for more information.