October 9, 2026
Upper Manhattan’s commercial corridors grew from neighborhood markets, transit links, and changing patterns of migration. This introduction traces the distinct histories of Harlem’s 125th Street and East Harlem’s La Marqueta, which opened beneath the Park Avenue viaduct in 1936.
September 22, 2026
Midtown Manhattan developed into a retail backbone through the 19th and 20th centuries, driven by department stores, flagship locations, and architectural innovations that defined the city’s commercial identity. This profile traces the evolution from the early arcades to landmark façades that still shape the street grid today.