As he carried out the tune, photographs of the conflict, the Ukrainian flag and President Volodymyr Zelensky have been proven on the display screen behind him.
The viewers responded with a refrain of loud boos and whistles, based on a number of media reviews.
The Maggie Might singer has beforehand been vocal in his help for Ukraine and reportedly rented a home for Ukrainian refugees in Britain.
In line with German media, Stewart’s help for Ukraine had been nicely obtained at earlier concert events in Copenhagen and Amsterdam.
Michael Roth, a overseas coverage professional for German Chancellor Olaf Scholz’s SPD, on Sunday referred to as Stewart the “hero of the day”.
“Thanks to your solidarity with the Ukrainian folks!” he wrote on X, previously Twitter.
However public opinion stays cut up on the problem, with some fearing Germany’s backing for Kyiv might danger escalating the conflict whereas others resent the sum of money being spent on Ukraine.
German far-left and far-right events which can be against the federal government’s backing for Ukraine each scored main positive aspects in final week’s European Union elections.