They have been some of the most famous leaders in the United States, but many of the interesting facts below are still unknown to most Americans:

- The only president that was never married was James Buchanan.

- Many U.S. presidents have been religious men. Most have been either Episcopalian or Presbyterian.

- Many years after his presidential term, John Tyler became a member of the Confederate States of America. He was the only president to become an official enemy of the United States.

- Victoria Woodhull was the first woman to run for presidential office in 1872.

- U.S. presidents are know for traveling around the world, but it wasn’t until 1972 that Richard Nixon, made the first presidential trip to China.

- Weighing in at less than 100 pounds, James Madison was the lightest American President.

- The president with the most children was John Tyler, who had a total of fifteen.

- President William McKinley was the first president to ride in a automobile

- The only president to be married in the White House was Grover Cleveland in 1886.

- Every American president has worn glasses. Many of them, however, declined to wear them at public functions.

- Rutherford Hayes was president when the first telephone was installed at the White House in 1879.

- Dwight D. Eisenhower was the president who had a putting green added to the White House lawn.

- The only first lady who was not born in America was Louisa Adams, the wife of John Quincy Adams.

- These nine presidents never attended college: George Washington, Andrew Jackson, Martin Van Buren, Abraham Lincoln, Zachary Taylor, Andrew Johnson, Millard Fillmore, Grover Cleveland, and Harry Truman.

- Calvin Coolidge was the only president born on the Fourth of July. Three presidents, however, have died on the Fourth of July: John Adams and Thomas Jefferson in 1826, and James Monroe in 1831.