BERLIN (AP) — Organizers say former U.S. President Barack Obama will take part in a discussion event with Chancellor Angela Merkel at a German Protestant conference in Berlin next month as Germany marks the 500th anniversary of the Reformation.

News agency dpa reported Tuesday that the May 25 event will take place in front of Berlin's landmark Brandenburg Gate, where Obama delivered a speech as president in 2013.

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The discussion on "shaping democracy — taking responsibility at home and in the world" is part of the German Protestant Kirchentag conference, held every two years.

Obama's successor, Donald Trump, is expected to visit Germany for the first time as president when Merkel hosts the Group of 20 summit in Hamburg in July.

Martin Luther's revolt against Catholic Church practices started in Germany in 1517.