The most frequently named 20th-century composer in works surveying Dutch music history, according to research conducted by Gert Floor, an archivist at The Netherlands Music Institute in The Hague, is surprisingly enough Guillaume Landré, though today he is relatively unknown. Landré not only composed operas, orchestral pieces, solo concertos and chamber music, but also held a number of administrative positions in music and was an important figure in national and international copyright organisations. His compositional style was largely influenced by Willem Pijper. In many of his later works, he used twelve-tone rows without strictly applying dodecaphonic technique.