It was sent to the states for ratification the next day, a process that was concluded on 6 December after the necessary three-quarters of states approved it.

Washington’s face was the first to be completed, seven years after work began. In July 1939 Roosevelt was the final likeness to be dedicated.

The Revenue Act of 1861 was signed into law by Abraham Lincoln, imposing U.S. federal income tax for the first time.

Abraham Lincoln was elected barely five months before the outbreak of the American Civil War, and was assassinated less than a month before its end.