16. Abraham Lincoln (1861-1865): “Honest Abe,” the tallest president at 6’4”, may have had Marfan Syndrome, a genetic disorder that causes people to be very tall, thin and long limbed.
17. Andrew Johnson (1865-1869): Though one of the few presidents without a pet, Johnson apparently cared for a family of White House mice, which he called “the little fellows.”
21. Chester A. Arthur (1881-1885): Arthur was named in honor of Chester Abell, the doctor who delivered him.
22. and 24. Grover Cleveland (1885-1889, 1893-1897): No president except Cleveland has ever served non-consecutive terms: He defeated James G. Blaine in 1884, lost to Benjamin Harrison in 1888 (despite winning the popular vote), and then came back to defeat Harrison in 1892.
25. William McKinley (1897-1901): McKinley’s likeness appears on the $500 bill, which was discontinued in 1969.
26. Theodore Roosevelt (1901-1909): Roosevelt was the youngest president, taking office at age 42.