From Europe to Latin America, demonstrations against inequality and corruption garnered international headlines.
Rubbish bins and cars were set on fire as 'yellow vest' ('gilets jaunes') protesters hit the streets again to mark the movement's one-year anniversary.
'Black bloc' and 'gilet jaunes' protesters fought running battles with police.
The "gilets jaunes" or "yellow vests" protesters clashed with French police in Nantes on Saturday. The movement brought some French towns to a standstill earlier this year.
Hundreds of protesters occupied the Pantheon monument in Paris on Friday to denounce the conditions illegal immigrants allegedly face in France.
French police fired tear gas at masked demonstrators in Lyon and Nantes on Saturday as heavy rain kept the number of yellow vest demonstrators down in Paris.
France's "yellow vest" anti-government demonstrations recorded their lowest turnout yet on Saturday, days after a wider May Day rally was marked by violent clashes in Paris.
Paris' prosecutor has begun a probe after May Day protesters allegedly entered a famed Paris hospital and tried to force the door to its intensive care unit.
Anti-government protesters hit the streets in France again on Saturday in a key test of President Emmanuel Macron's authority.