Traveling Piano Man Performs 'Imagine' at Dallas Police Headquarters Following Attack

The globetrotting pianist, who has gained worldwide recognition playing John Lennon’s “Imagine” after horrific tragedies, performed Sunday evening at Dallas Police headquarters.

Read: Dallas Gunman's Parents Tearfully Break Their Silence: 'I Love my Son... I Hate What He Did'

Davide Martello, also known as Klavierkunst, mysteriously showed up to the headquarters Sunday and performed the hit tune from the late Beatle.

Martello, who played the song in Paris following the November attacks on the city, tweeted he was going to Dallas to help “promote peace.”

the colours of my pianokeys inspired me to come to Dallas today. I will play infront of the memorial to promote peace

— Davide Martello (@Klavierkunst) July 10, 2016

The German musician set up his piano and did not say a word as he began to play, according to reports. Mourners were already in front of the headquarters paying respects to the five officers that were killed by gunman Micah Xavier Johnson Thursday as he attacked a protest rally in the city.

Read: Pianist Plays John Lennon's 'Imagine' Near Paris Concert Hall Where 87 Were Slaughtered

As Martello performed, civilians gathered around his piano and began singing along.

Watch: Sister of Dallas Gunman: 'I Keep Saying It's Not True'