German Vice Chancellor and Foreign Minister Guido Westerwelle will start a visit to Bulgaria on Thursday at the invitation of Foreign Minister Nickolay Mladenov.
The two ministers will hold a meeting.
Vice Chancellor Westerwelle will open an exhibition in Parliament, entitled "Codes of History", which features works by 30 young painters inspired by the fall of the Berlin Wall and the unification of Germany.
The visit is part of the German minister's Eastern European tour, which covers Poland, Bulgaria, Romania and Moldova.
He travelled first to Poland to participate in a forum alongside his counterpart Radoslaw Sikorski on Thursday, before heading to Bulgaria for talks with Foreign Minister Nikolay Mladenov and Prime Minister Boyko Borisov.
He will also go to Romania to meet President Traian Basescu and Foreign Minister Theodor Baconschi, Westerwelle's spokesman Andreas Peschke told a regular briefing.
Following a visit to German minorities in Romania, the minister will also make a brief trip to Moldova to meet his counterpart Iurie Leanca.
Discussions would focus on European policy and cooperation in the Black Sea, his spokesman said.