Ribbon Cutting celebrating Millwork Marketplace. Millwork Marketplace is a commercial, retail & entertainment mecca located inside the newly renovated, 260,000 SF, Novelty Iron Works Building. Nestled in the heart of Dubuque's up & coming Historic Millwork District, The Novelty Iron Works Building encompasses the whole city block (2.2 acres), from E. 10th & Washington Streets to E. 11th & Elm Streets.