Every Wednesday in April, the “Brian Lehrer Show” on WNYC is hosting a series called “Cityscapes,” conversation with New Yorker architecture critic Paul Goldberger, Hon. AIA, about the changing city. Check out the website to listen to the shows, view the walking tours by notable architects Hugh Hardy, FAIA, Stephen Cassell, AIA, Michael Van Valkenburgh, FASLA, and Elizabeth Diller, and read the blog by architecture critic Andrew Blum.