Officers of the Order of Orange-Nassau

Maurits Cornelis Escher (Dutch pronunciation: [ˈmʌurɪt͡s kɔrˈneːlɪs ˈɛʃər]; 17 June 1898 – 27 March 1972) was a Dutch graphic artist who made woodcuts, lithographs, and mezzotints, many of which were inspired by mathematics.
Despite wide popular interest, for most of his life Escher was neglected in the art world, even in his native Netherlands. He was 70 before a retrospective exhibition was held. In the late twentieth century, he became more widely appreciated, and in the twenty-first century he has been celebrated in exhibitions around the world.
His work features mathematical objects and operations including impossible objects, explorations of infinity, reflection, symmetry, perspective, truncated and stellated polyhedra, hyperbolic geometry, and tessellations. Although Escher believed he had no mathematical ability, he interacted with the mathematicians George Pólya, Roger Penrose, and Donald Coxeter, and the crystallographer Friedrich Haag, and conducted his own research into tessellation.
Early in his career, he drew inspiration from nature, making studies of insects, landscapes, and plants such as lichens, all of which he used as details in his artworks. He traveled in Italy and Spain, sketching buildings, townscapes, architecture and the tilings of the Alhambra and the Mezquita of Cordoba, and became steadily more interested in their mathematical structure.
Escher's art became well known among scientists and mathematicians, and in popular culture, especially after it was featured by Martin Gardner in his April 1966 Mathematical Games column in Scientific American. Apart from being used in a variety of technical papers, his work has appeared on the covers of many books and albums. He was one of the major inspirations for Douglas Hofstadter's Pulitzer Prize-winning 1979 book Gödel, Escher, Bach.

Johannes Cornelis Hendrik de Meijere (1 April 1866, Deventer – 6 November 1947) was a Dutch zoologist and entomologist who specialised in Diptera and Coleoptera.
Prof. dr. Johannes Cornelis Hendrik de Meijere was Rector Magnificus at the University of Amsterdam.

Bernard Wagenaar (July 18, 1894 – May 19, 1971) was a Dutch-American composer, conductor and violinist.
Wagenaar was born in Arnhem. He studied at Utrecht University before starting his career as a teacher and conductor in 1914. He moved to the U.S. in 1920, and he became a citizen in 1927. From 1925 to 1968 he taught at the Juilliard School, where Ned Rorem, Jacob Druckman, Norman Dello Joio, Bernard Herrmann, Robert Ward, Tutti Camarata, Charles Jones, Alan Shulman, Katharine Mulky Warne, and James Cohn were among his pupils. He was an active member of the League of Composers and similar organizations and was an officer of the Order of Orange-Nassau in the Netherlands. He died in York, Maine.
He wrote four symphonies (1926, 1930, 1936 and 1946) and other orchestral, vocal, and chamber music in a broadly neoclassical style.His second symphony was one of the few American works Arturo Toscanini performed with the New York Philharmonic Orchestra; the first performances were on November 10, 11, and 13, 1933, in Carnegie Hall.