Conference in memory of Thomas Friedrich (1949-2018). Invited speakers include Ulrich Bunke (Regensburg), Marisa Fernandez (Bilbao), Anna Fino (Torino), Joachim Hilgert (Paderborn), Stefan Ivanov (Sofia), Andrei Moroianu (Paris), Werner Mueller (Bonn), Paul-Emile Paradan (Montpellier), Simon Salamon (London), and Jan Slovak (Brno).