The Venice expansion introduces the Espionage mechanic, which changes layout philosophy:
To achieve a 100% "Harmonious City" rating in the Venice expansion, your layout must have zero intersecting production chains within the housing zones. anno 1404 venice city layout
Every layout in Anno 1404 revolves around the Market Building. Unlike Anno 1800 (where influence radius is flexible), Anno 1404 is strict: A market has a finite walking distance. Every layout in Anno 1404 revolves around the
Pro Tip: Never place a market at the edge of your warehouse. Place it in the center of your planned residential block. You will build multiple markets per island. Pro Tip: Never place a market at the edge of your warehouse