Here’s a look at how the March for Our Lives protest stacks up against other huge events at the national mall in Washington, D.C. USA TODAY

March for Our Lives organizers estimate 800,000 protesters attended the gun-control demonstration in Washington, D.C., on Saturday.

If they’re correct, the event would be the largest single-day protest in the history of the nation’s capital. The total is bigger than  the inaugural Women’s March, which brought 500,000 to D.C., according to the Washington Post.

The number doesn’t include large rallies in cities such as Boston, Houston, Minneapolis and Parkland, Fla., the site of the Valentine’s Day attack at Marjory Stoneman Douglas High School that left 17 people dead.

On Sunday, another crowd estimate came in much smaller for the D.C. march. About 200,000 people attended the rally, according to Digital Design & Imaging Service Inc., a Virginia-based company that calculates crowd size.

There have been no official police estimates.