As the world grieves the co-ordinated strikes in France that killed at least 129 people Friday night, a German musician showed his sympathy Saturday by biking his portable grand piano close to the attacked Parisian concert hall and playing John Lennon's famous peace anthem Imagine.

Davide Martello, who performs under the name Klavierkunst, played the song about 100 metres from the entrance of the Bataclan concert hall, where gunmen killed hostages during a rock concert on Friday. The concert hall was the scene of the Paris attacks' worst carnage, with an estimated 89 people killed there.

Dozens of journalists and pedestrians took in the spontaneous street performance, filming it with their cameras. Claus Reinholdt of Denmark's TV2 watched the performance and told CBC News it was incredibly moving.

France Paris Attacks

Davide Martello brought his portable grand piano and played John Lennon's Imagine outside the Bataclan concert hall on Saturday. The concert hall was one of the sites of Friday's attack in Paris. (John Walton PA via AP)

"He just pulled up and started playing. Everyone suddenly stopped talking while he played. It was a touching moment," he said in a written message.

A small hitch on the back of Martello's bike carried the piano, which had a peace sign on the top of it.

Martello told CBC News that the idea came to him while he was sitting at a pub in Konstanz, Germany watching the friendly soccer match between France and Germany. One of the attacks took place outside the Stade de France, which could be heard in the broadcast.

"After I saw that insane violence I just followed my heart and went to Paris with my piano," he told CBC News in an email.

"This was one of my most touching moments in my life."

Earlier Saturday, he posted on his Facebook and Twitter accounts, identifying himself as the piano man.

Martello is known for bringing his portable piano to different parts of Europe.

He famously played in Istanbul's Taksim Square back in 2013 during anti-government protests. He was later awarded the Wilhelm Haller Peace Prize for his performance there.


German pianist Davide Martello is surrounded by anti-government protesters as he performs in Istanbul's Taksim Square on June 13, 2013. (Yannis Behrakis/Reuters)