Lecture Guest Lecture: Prof. Dr. Mark Ruff 30 May 2016, 06:00 p.m. – 08:00 p.m. CERES Palais, room "Ruhrpott" (4.13) Meeting Monday Meeting: Focus Group Ritual II 30 May 2016, 04:15 p.m. – 05:45 p.m. CERES Palais, room "Ruhrpott" (4.13)