Hundreds of people gathered in London chanting "Time's up! Time's up!", as similar demonstrations took place across the continent.
"I am here today to say time is up on violence against women and girls all across the world," Kiyleigh, 29, told AFP at the march outside Prime Minister Theresa May's Downing Street office yesterday.
"I work with women who suffer from domestic abuse, sexual abuse from male perpetrators and I don't want to see that any more," she said.
Social campaigner Helen Pankhurst, the great granddaughter of suffragette Emmeline Pankhurst, was among the figures to give speeches.
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"No means no. Sexual harassment is not OK. Abuse is not OK. People have to respect what women say," said Liberty Folker, 27, who came with her dog Gwen and held a placard reading: "Even this dog knows no means no".
"Every woman I know has experienced some kind of harassment or abuse or rape. I myself have and I don't want that for any woman anywhere, not just here but all across the world," she told AFP.
Others denounced Trump's remarks about women, one held a placard reading: "Grab 'em by the patriarchy".
As protesters moved through Berlin's government district, the crowd grew to around a thousand people, including expatriate Americans and a large male minority.
Many parents brought their school-age children, who carried signs with slogans including "Love Trumps Hate" and "Equality For All".
A series of speeches by organisers encouraged Americans abroad to sign up for absentee ballots for the US midterm congressional elections in November.
In the United States, protestors took to the streets en masse yesterday, hoisting anti-Trump placards, banging drums and donning pink hats for a second Women's March opposing the president - one year to the day since his inauguration.
Hundreds of thousands of marchers assembled in Los Angeles, New York, Washington, Chicago, Denver, Boston and other cities nationwide, many donning the famous pink knit "pussy hats" - a reference to Trump's videotaped boasts of his license to grope women without repercussions.
They were joined by actresses like Whoopi Goldberg in New York and Natalie Portman in Los Angeles.