The only constitutionally mandated event on Inauguration Day is for the president-elect to take the oath of office. But on the first Inauguration Day, in 1789, George Washington did something else. He gave a speech.

Donald Trump will become the 47th President on Monday. However, George Washington, Abraham Lincoln, and Franklin D. Roosevelt stand out as America's greatest leaders in its 250-year history.

President-elect Donald Trump’s inauguration on January 20 will mark the 60th presidential swearing-in ceremony in United States history.

Donald Trump will be only the second U.S. president after Grover Cleveland to serve two nonconsecutive terms after he takes the oath of office Monday.

1789 — A presidential inauguration has taken place every four years since George Washington took the oath of office in New York City in 1789. He established the tradition for a two term limit and Thomas Jefferson institutionalized it. This tradition was followed by subsequent presidents until President Franklin D. Roosevelt was elected four times.

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 are by definition historic acts, but when we think of past Inauguration Days there is clearly a hierarchy of historical pop.

Trump is kicking off his second term with a flurry of executive actions. Here's a look at the three main types — orders, proclamations and memorandums — and how they typically work.

Donald Trump enters his second presidency, as he did his first, pledging to wield executive power in novel and aggressive ways. This is neither new nor necessarily bad. “Presidents who go down in the history books as ‘great’ are those who reach for power, who assert their authority to the limit,” the presidential scholar Richard Pious noted.

Donald Trump is the 47th president of the United States in his second non-consecutive term. Donald Trump will be sown in as the 47th President of the U.S. inside the U.S. Capitol Rotunda.

The worst weather for an inaugural came in March 1909, when 10 inches of snow forced William H. Taft to move indoors to be sworn in.

The incoming first lady Melania Trump has many asking, “What will Melania wear?” The interest in first ladies inaugural fashion has even puzzled some first ladies and their next of kin. In 1912 when the Smithsonian was piecing together a centennial spanning exhibition of fashion that was a precursor to its First Ladies collection,