epa07894893 Bulgarian President Rumen Radev (L) and Austrian Federal President Alexander Van der Bellen (R) arrive ahead of a meeting at the Presidential residence of the Hofburg Palace, in Vienna, Austria, 04 October 2019. Radev is on a working visit in Vienna. EPA-EFE/CHRISTIAN BRUNA
Bulgarian President Rumen Radev (L) and Austrian Federal President Alexander Van der Bellen (R) arrive ahead of a meeting at the Presidential residence of the Hofburg Palace, in Vienna, Austria.