Leaders of the Group of 20 economic powers and their spouses have gathered at Hamburg's spectacular new Elbphilharmonie concert hall where they have applauded the summit host, German Chancellor Angela Merkel.
US President Donald Trump and first lady Melania Trump sat next to French President Emmanuel Macron and his wife, Brigitte, with Merkel taking a place in a row behind them.
Russian President Vladimir Putin, British Prime Minister Theresa May and Australian Prime Minister Malcolm Turnbull were also in attendance.
The leaders heard Beethoven's Ninth Symphony, conducted by American Kent Nagano.
Merkel and her husband, Joachim Sauer, are classical music fans. Sauer, who rarely accompanies the chancellor on official business, was on hand for the G20 and to host the concert alongside Merkel.
Built on top of a former cocoa and coffee warehouse jutting out into the harbour of Germany's second-biggest city, the Elbphilharmonie boasts a main concert hall that can seat 2100 people.
It has been praised for its impressive acoustics.
The Elbphilharmonie opened only six months ago and has been praised for its impressive acoustics.
