(b Haarlem, 19 Oct 1881; d Haarlem, 26 Feb 1940). Dutch architect. He studied architecture at the Technische Hogeschool in Delft (1905–9) and established a practice in Haarlem. His first projects, such as his own house (1912) in Haarlem, were fairly traditional designs, but by 1916 the influence of Frank Lloyd Wright was already apparent in a small banking office and residence in Hoofddorp. In 1917 he began work on the first of a series of housing complexes in Haarlem, including Rosenhage (1919–22). He evolved a plain, flat-roofed brick style that used no ornament but only modelling of building volume to great effect; in Tuinwijk Zuid (1920–22) the rows of housing are complex compositions in which units are manipulated in all three dimensions to form roof terraces, entrance setbacks, window bays and portals leading into the small park at the centre of the U-shaped block. In 1922–3 he built the Patria housing complex in north Haarlem; it has a brick ground storey, but the upper storey is one of the first built manifestations of the International style: flat, orthogonal, white stucco with square windows and glazed corners. He was able to complete this stylistic breakthrough completely in another commission, the two-storey rows (1922–3), built as part of Amsterdam’s Betondorp concrete village.