A day after Donald Trump became the 45th President of the United States, hundreds of thousands took to the streets in a mass march designed to send a message to the president and his administration.
Massive numbers of demonstrators flooded cities across the U.S. and the world in peaceful protests to voice their concerns. CNBC compiled some of the most compelling shots of the day: Click through the following to see some of what took place.
Demonstrators arrive via public transportation in Washington, DC. to take part in a "Women's March" to speak out on key political issues, just one day after the inauguration of Donald Trump.
Demonstrators line up on the National Mall in Washington, DC, for the Women's March on January 21, 2017. Hundreds of thousands of marchers, spearheaded by women's rights groups, fanned out across major cities to send a message to President Donald Trump.
Michael Moore speaks onstage during the Women's March on Washington on January 21, 2017 in Washington, DC.
Tens of thousands in Civic Center Park for the Women's March on Denver January 21, 2017.
A Woman wearing a USA flag as a headscarf attends a protest for women's rights and freedom in solidarity with the Women's March on Washington in front of Brandenburger Tor on January 21, 2017 in Berlin, Germany.
Protesters read signs from the Women's March in Washington laid around the National Monument.
A protester carries a sign supporting Hillary Clinton who won the popular vote but lost in the electoral college.
Federal police take off their riot gear before the Women's March on Washington on January 21, 2017 in Washington, DC. Demonstrators gathered in peaceful protest with no major incidents reported.
A collection of signs from the Women's March in Washington, D.C. were left outside the gates of the White House.
Protesters participate in the Women's March on January 21, 2017 in Chicago, Illinois.
Marchers hold up anti-Trump signs as people protest during the Women's march on the Trocadero in front of the Eiffel Tower in Paris, France.
A demonstrator holds a sign during the Boston Women's March in Boston, Massachusetts, U.S., on Saturday, Jan. 21, 2017.
Protesters take part in the Women's March on Washington on Jan. 21, 2017.
Women's March on London to coincide with the first day of Donald Trump's Presidency on January 21st 2017 in London, United Kingdom.
Demonstrators march across 42nd Street in New York during the Womens March on January 21, 2017.
Thousands of protesters take part in the Women's March in downtown Los Angeles.
Singer Miley Cyrus (lower L), actresses Marcia Gay Harden (L) and Jane Fonda (2nd L) join in the Women's March on January 21, 2017 in Los Angeles.
A large group make their way during the Women's March on January 21, 2017 in Barcelona, Spain.
The Midtown Manhattan event was one of many civil demonstrations nationwide that came a day after Donald Trump was sworn in as the 45th President of the United States.
Demonstrators attend the Women's March to protest President Donald Trump in Washington, USA on January 21, 2017.
A Melbourne rally speaks out against the Trump Inauguration on January 21, 2017 in Melbourne, Australia.
Demonstrators make their way from the I amsterdam sign in front of the Rijksmuseum towards U.S. Consulate during the Women's March held at Museumplein on January 21, 2017 in Amsterdam, Netherlands.
Signs are left near the White House during the Women's March on Washington on January 21, 2017 in Washington, DC.