JOHNSTON, IOWA (November 2, 2022) — Explore the wonders of the "Masterpiece on the Mississippi" in Iowa PBS's hour-long documentary, Historic Buildings of Iowa: Dubuque. This documentary premieres online and on-air Monday, November 21, 8PM, as part of Festival 2022. The program will be rebroadcast on Saturday, November 26, 4PM, and on Sunday, November 27, 12:3PM.