The district's prominence declined after the city of Brno was officially established in 1243, relegating Staré Brno to a suburban role. The Thirty Years' War in the 17th century further devastated the area, as it lacked defensive walls and fell victim to Swedish sieges. Staré Brno's industrialization began in the late 18th century, taking advantage of its flat terrain and proximity to water. Factories flourished, making it a hub for working-class communities. The incorporation of Staré Brno into the city in 1850 marked a shift, though it maintained its identity as a katastrální území, or cadastral unit.