2007 MARKED THE 100TH ANNIVERSARY of Pablo Picasso's painting Les Demoiselles d'Avignon. The Demoiselles triggered the invention of Cubism and ignited an artistic revolution. Form broke free. Abstraction erupted. In this short essay, The Architect Painter JEF7REY HILDNER revisits Picasso's landmark canvas, x-rays its organizing principles, and discovers new . . . PICASSO LESSONS.