Frank-Walter Steinmeier is Germany's Foreign Minister in Angela Merkel's coalition government.
On Malta, Greek and EU finance ministers agreed "in principle" to new austerity measures allowing Greece's third bailout to proceed. The deal comes as German President Frank-Walter Steinmeier is in Athens to open Documenta 14, one of Europe's top art festivals.
The outgoing German president has stressed a commitment to the Baltics amid concerns over Russian territorial ambitions. His likely successor, Frank-Walter Steinmeier, has been more restrained in criticizing Moscow.