Margon & Holder (Stewart B. Margon and Edwin S. Holder) collaborated with Emery Roth on The Eldorado (1929–1931) at 300 Central Park West — the northernmost of the four Art Deco twin-towered cooperatives that define the avenue's silhouette. The Eldorado is the most overtly Art Deco of Roth's twin-tower commissions, with Margon & Holder contributing materially to the ornamental vocabulary that distinguishes the building from Roth's adjacent San Remo (1930) and the earlier Beresford (1929). The firm's broader Manhattan portfolio includes additional interwar apartment commissions; their collaboration on the Eldorado remains the most consequential of their surviving buildings and a defining example of late-Art-Deco residential ambition in New York.
Biography
