The joint Prague–Vienna Set Theory Workshop is a meeting jointly organized by the Institute of Mathematics of the Czech Academy of Sciences and the Kurt Gödel Research Center for Mathematical Logic, University of Vienna. The workshop will take place on Monday–Wednesday October 17–19 in the blue lecture hall, Institute of Mathematics CAS, Žitná 25, Prague 1, Czech Republic. The workshop is open for all participants, there is no conference fee and no registration is necessary. However, if you intend to participate, please contact David Chodounský, especially in case you want to present a talk or need help arranging accommodation in Prague.