In 1886 at age thirteen Joseph de Leeuw joined Metz & Co., which was located on the Sint Antoniesbreestraat at the time. Ten years later he was a partner. In 1902 the firm moved to larger premises on the Kalverstraat and again in 1908 to the spacious and stately building on the corner of the Leidsestraat and the Keizersgracht. Before World War I, Joseph de Leeuw was the director and sole owner of …