On Saturday, Davide Martello, a German pianist and street artist who performs under the name Klavierkunst, pedaled to the Bataclan concert hall pulling a custom-built piano behind his bike, freshly emblazoned with a peace symbol. The previous night, terrorists had murdered nearly 100 people at an Eagles of Death Metal show at the venue in a series of coordinated attacks in Paris.

Without a word to the assembled crowd and as dozens of film crews scrambled to get footage, Martello played a beautiful instrumental version of “Imagine.”

It’s doubtful that John Lennon’s masterpiece envisioning a world with no countries, religion, violence, or hate has ever been performed in a more poignant setting. With the last notes still floating in the air and still without saying a word, he pedaled away, baby grand in tow.

Later on social media, Martello revealed he’d been watching the soccer match between France and Germany at a pub in Konstanz, Germany when the attacks began. In all, 127 people were killed and more than 400 injured in the attacks scattered throughout the French capitol.

“After I saw that insane violence I just followed my heart and went to Paris with my piano,” he wrote on Facebook. “This was one of my most touching moments in my life …”

Later on Twitter, he would add, “Paris - I feel with you. Let's stand together for a free and peaceful world.”

Robert Annis After spending nearly a decade as a reporter for The Indianapolis Star, Robert Annis finally broke free of the shackles of gainful employment and now freelances full time, specializing in cycling and outdoor-travel journalism. Over the years, Robert's byline has appeared in numerous publications and websites, including Outside, National Geographic Traveler, Afar, Bicycling, Men's Journal, Popular Mechanics, Lonely Planet, the Chicago Tribune, and Adventure.com

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