U.S. and Minnesota flags on government buildings will be flown at half-mast through sunset today, in honor of the assassination of President Abraham Lincoln, who died 150 years ago today.

Lincoln was shot on April 14, 1865, while attending a play at Ford’s Theater in Washington, D.C. The assassin, John Wilkes Booth, was a Confederate sympathizer who hoped to throw the U.S. government into disarray.

Lincoln died the next day.

Less than a week earlier, Confederate General Robert E. Lee had surrendered his army, effectively ending the Civil War.