Biographical sketch of Alphons Siebers Petrus Alphonsus Maria (Alphons) Siebers was born on September 15, 1893 in Amsterdam. He grew up in a Catholic milieu. In 1919 he graduated from the architecture course at the Technical High School in Delft, after which in 1921 he established himself as an independent architect in Rotterdam. Here he worked with traditionalists such as Granpré Molière Kok and Verhagen, Kropholler and Buskens. Among other things, he collaborates on garden village Vreewijk. His later works also bear the stamp of traditionalism, while his religious buildings are strongly influenced by the Bossche School. Siebers focuses on both architecture and urban planning. In 1923, his booklet The Preservation of Rotterdam is published. During his Rotterdam period, Siebers also designed several pieces of furniture. Siebers travels to Vienna and London in 1926 as a fellow of the Rockefeller Foundation, and from late 1926 for a year to the United States, where he visits many of the major cities. He also visits Frank Lloyd Wright and Lewis Mumford. He works for three months in the office of the Regional Plan of New York and its Environs. In the U.S., survey thinking (planning and design based on quantification and statistics) was then emerging within urban planning. It was hoped that the knowledge gained could be used for the design of the newly created Zuiderzee polders. Not long after his return from the US, he traveled through France, Italy and Germany. On February 8, 1934 he marries Lydia Nylaender (Tallin, Estonia, March 2, 1910).In 1935 he goes to The Hague, where he associates with N. Molenaar. 1937 he moves to Ulvenhout near Breda, where he will live until the end of his life. Here he associates with Van Dael in 1946. The firm Siebers and Van Dael realized many housing estates, schools, town halls and churches. It continued to exist until 1966, when Siebers retired. Then the firm continued as Van Dael and Ruys. In the 1970s, Van Dael retires and the firm continues as Ruys and Bolder. Alphons Siebers died on May 15, 1978. Today the firm still exists under the name Composition 5. Siebers' interests included not only urban planning - he was an active member of the BNS and of the Urban Planning Council of the NIVOS - and architecture, but also religious architecture, philosophy and theology. Siebers was editor of the RK Bouwblad (1929-1933) and chairman of the of the AKKV (Algemene Katholieke Kunstenaars Vereniging) (1929-1935) and a member of the committee Studiedagen Huybergen (1932-1940). After the war, Siebers and Van Dael were part of the group around Dom Hans van der Laan, which would later be referred to as the "Bossche School. It was all about sober building forms, in which dimensional harmony according to the 'plastic number' was the starting point. From 1932 to 1950, Siebers taught at the Academy of Architecture in Tilburg (the HBO and VBO at the Katholieke Leergangen). Furthermore, Siebers was a member of the Provincial Commission for Expansion Plans in South Holland (Provincial Planning Commission) (1929-1968), secretary of the Beauty Commission of the Institute City and Landscape of South Holland (1929-1931), head of Rijkskunstbescherming West Noord-Brabant (1944-1946), architectural inspector for reconstruction in the Diocese of Breda (1946-1954), board member of the Academy of Architecture in Tilburg (1950-1965) and board member of the Church Architecture Course in 's-Hertogenbosch (1946-1968) and of the Mrg. van Heukelum Foundation (1965-1968). In 1952 Siebers was decorated as an Officer in the Order of Orange Nassau. Siebers' major works include the expansion plan Nijmegen (1930-1933), the reconstruction plan Nijmegen (1944), workers' housing at Noordwijkerhout (1933, i.c.w. Kropholler), town hall in Gilze-Rijnen (1938-1940), mayor's residence in Voorhout (1939-1940), town hall and field watchman's residence in Wervershoof (1939-1941), and from the period Siebers and Van Dael the restoration of RK Kerk St. Lambertus in Wouw (1949-1951), the Seminary Ypelaar in Nieuw-Ginneken (1947-1951), RK Kerk and parsonage-grandparsonage Schoondijke (1948), housing Heuvelkwartier Breda (1951-1953), Roman Catholic church in Philipine (1952), Polish chapel Breda (1954), boarding school 'Sint Nicolaas' in at Nijmegen (1953-1954), town hall Nieuw-Ginneken (1954-1962), Petrus Canisiuskerk at Nijmegen (1957-1959), the Mencia de Mendoza Lyceum Breda (1954-1958) and UTS/MTS school Nijmegen (1960-1967). Furthermore, Siebers and Van Dael built a large number of houses and schools and a number of bank buildings.