| sources:these nine ingredients are: "Wendingen VII" (the issue about Frank Lloyd Wright, designed by Hendrik Th Wijdeveld.); Fröbels Gifts (construction toys); The Royal Game of Ur; "The Craftsman" by Richard Sennett; "The Seven Lamps of Architecture" by John Ruskin; A tapestry of Freemasonry; The Sonsbeekpavillion by Aldo van Eyck; Harmony of the spheres of Johannes Kepler and "De glanzende kiemcel" by Simon Vestdijk. |