Abraham Lincoln, then 33, married 23-year-old Mary Todd on November 4, 1842.
Lincoln had broken his first engagement to Todd, but the two settled down as newlyweds in Springfield, Illinois. The couple would go on to lead a troubled family life, as three of their four sons would die from various diseases and injuries before reaching adulthood.
The former first lady's dire mental health state sparked grave concern from her family and friends after her husband's assassination on April 15, 1865.