This Saturday, organizers for the pro-gun control March for Our Lives in D.C. estimated that as many 800,000 people turned out for the rally.

NBC’s Rebecca Shabad tweeted that she learned the estimate from officials for the march.

Officials tell @NBCNews that they are estimating 800,000 people gathered in Washington, DC today for the #marchforourlives rally. — Rebecca Shabad (@RebeccaShabad) March 24, 2018

Although police haven’t given their official numbers yet, estimates for the march exceeds most given for the crowd size at President Trump’s inauguration. According to The Washington Post, around 600,000 attended the inauguration.

If the estimates are correct, the event would be the largest single-day protest in the history of D.C. The total is also bigger than the inaugural Women’s March in D.C., which brought in around 500,000 people.

One more photo from D.C.: A tremendous @salwangeorges shot showing the sea of people on Pennsylvania Avenue for the March for Our Lives https://t.co/j82e5PUYB6 pic.twitter.com/gYdWI0IzWJ — Mark Berman (@markberman) March 24, 2018

From USA Today:

Other large protests in D.C. history include the 500,000 to 600,000 people who demonstrated against the Vietnam War in D.C. in 1969. The March on Washington for Jobs and Freedom on Aug. 28, 1963, drew about 250,000 people to D.C. where Martin Luther King Jr. delivered his famous “I have a dream” speech. And the Million Man March in 1995 garnered estimates of between 450,000 to 1.1 million people, according to the Encyclopedia Brittanica.

Marches were held in numerous cities, including Los Angeles, Boston, Houston, Minneapolis and Parkland, Florida, the site of the February attack at Marjory Stoneman Douglas High School that left 17 people dead.

[USA Today/The Hill] Featured image via Twitter