The 39th annual international Petri Nets conference will be organized by the Interes.Institute in Bratislava in cooperation with Faculty of Electrical Engineering and Information Technology and Faculty of Informatics and Information Technologies, Slovak University of Technology in Bratislava, Slovak Republic. The conference will take place at Hotel Austria Trend, Vysoka street 2A, 811 06 Bratislava, Slovak Republic. The language of the conference is English, and its proceedings will be published by Springer-Verlag in Lecture Notes in Computer Science. Papers presenting original research on application or theory of Petri nets, as well as contributions addressing topics relevant to the general field of distributed and concurrent systems are sought. All accepted regular papers will be considered for an “Outstanding Paper” award. Some of the best papers will be invited, in an extended form, as submissions to a special issue of a well-established computer science journal.