5:30 p.m., Baltimore Museum of Industry, 1415 Key Highway, (410) 727-4808, thebmi.org, free (registration suggested).
When a society moves on, there are always things that are left behind. In his new book, photographer Matthew Christopher documents decaying buildings and abandoned homes. Hear him talk about the way he captured the arresting images—and what he thinks they tell us about the state we call home. His book and select prints will be available for sale.