View from a window of the Gravensteen in Leiden, t… Edward O. Wilson delivering the Tinbergen Lecture… Edward O. Wilson delivering the Tinbergen Lecture… Edward O. Wilson delivering the Tinbergen Lecture… Edward O. Wilson delivering the Tinbergen Lecture… Ga gerust uw gang Old pictures of my office Old pictures of my office Old pictures of the Pathology Lab Old pictures of my office Old pictures of my office Old pictures of my office Old pictures of my office Old pictures of my office "Kom eruit, klootzak!" Silhouette of the Academy Building in Leiden, the… Garden of the administrative building of Leiden Un… Science in action Rijksuniversiteitsmanege My day job: at a presentation of the new marketing… My day job: at a presentation of the new marketing… Old pump used by the Physics department of Leiden… Entrance to the Huygens Laboratory View from a window of the Gravensteen in Leiden, t… View from a window of the Gravensteen in Leiden, t… Six-pack angel with hourglass Academy Building of Leiden University just before… Academy Building of Leiden University just before… Academy Building of Leiden University just before… Academy Building of Leiden University just before… Academy Building of Leiden University just before… Solving our archive space problem at work: floodin… The Opening of the Academic Year of Leiden Univers… The Opening of the Academic Year of Leiden Univers… Staircase, Rapenburg 67 A friend of mine received a M. Phil. in one of the… Roof ornament on the ground in the Hortus Botanicu… Leiden weer gezellig Going-away reception at the University Library: dr… Going-away reception at the University Library: sp… Going-away reception at the University Library: fo… Meeting room of Leiden Observatory dies natalis of Leiden University A professor with many honourary doctorates A friend of mine received his master's degree toda…