Moscow's top diplomat traveled with the Russian delegation to Finland, and Trump's performance has delighted the Kremlin greatly.
Who came out on top?
Putin's Aurus Senat Kortezh was unveiled in May and has been seen alongside Trump's Beast limo in Helsinki.
The two leaders began the day with a tête-à-tête—and are now in a bigger meeting with officials.
The demonstration was done in conjunction with the Kallio church, according to a Greenpeace press release.
The newspaper Helsingin Sanomat launched the campaign.
President Trump will meet Putin on Monday in Helsinki, Finland.
The Finnish capital is no stranger to high-stakes Moscow-Washington summits.
Trump should not further insult and alienate the Europeans.
Life with ISIS "was not what I thought," said one former fighter. Now, he has no future in Europe.
Finland has become more concerned after attacks in neighboring Sweden and Russia.
"The proposal remains in place," Finland's ambassador to Russia has said.