Which president had the longest inaugural address? Which has been sworn in the most? Which ended the ceremony’s top-hat tradition? Here are some tidbits you might not know about Inauguration Day.

Presidential inaugurations show the world America’s orderly, peaceful transfer of power, which is the hallmark of America’s system of government.

President William Henry Harrison delivered his inaugural address on a bitterly cold day in March 1841. He refused to wear a coat and traveled to and from the inauguration on open horseback. His address is also the longest in U.S. history, with Harrison speaking for more than two hours.

President-elect Donald Trump is being sworn in on Monday as his inauguration ceremony is set to take rare form inside the U.S. Capitol.

The true test of leadership is not in the position, but in the impact you have on others.” — John Quincy Adams Related: Abraham Lincoln's Most Memorable Quotes 26. “America is a tune. It must be sung together.

The image captured crowds of onlookers standing outside the East Portico of the U.S. Capitol—which was still under construction at the time. The foreground area was actually a stone yard that had been covered with boards and used as a platform for spectators.

From historic Bibles to the leading role of the country's chief justice, Inauguration Day has been filled with traditions. Which ones have endured?

As millions watched President Donald Trump’s inauguration at the White House on Monday, Jan. 20, many noticed that he did not place his left hand on a Bible while being sworn in. Now people are questioning that gesture, and wondering if the president can be sworn in without using a Bible.

A federal judge temporarily blocked President Trump’s executive order that aims to restrict automatic citizenship to babies born on U.S. soil, calling it “blatantly unconstitutional.” The order Mr. Trump signed on Monday would reverse decades of precedent and affect children born to undocumented or temporary immigrants.

As Donald Trump takes the oath of office, John Barrasso continues his lifelong tradition of honoring the peaceful transfer of power.

(AP Photo/Julia Demaree Nikhinson, Pool) Donald Trump is sworn in as the 47th president of the United States by Chief Justice John Roberts as Melania Trump holds the Bible during the 60th Presidential Inauguration in the Rotunda of the U.S. Capitol in ...

(Chip Somodevilla/Pool Photo via AP) Donald Trump is sworn in as the 47th president of the United States by Chief Justice John Roberts as Melania Trump holds the Bible during the 60th Presidential Inauguration in the Rotunda of the U.S. Capitol in ...