Former President Barack Obama was spotted at the inauguration of Donald Trump. See pictures of the former president here.

President Calvin Coolidge's inauguration was the first to be broadcast live on the radio. A lot has changed since then.

Ahead of Donald Trump's second inauguration, take a look back at the transition of presidential power throughout U.S. history ...

Donald J. Trump is sworn in as the nation’s 47th president of the United States as Americans give a ceremonial farewell to ...

Former President George W. Bush was spotted at the inauguration of Donald Trump. See pictures of the former president here.

As Donald Trump is inaugurated as the 47th President of the United States on Monday, we look at the most notable ceremonies ...

Photos from the inauguration of President Donald Trump as he takes office for his second term as the 47th president of the United States. President Donald Trump and first lady Melania Trump ...

WASHINGTON — Donald Trump was sworn in as the 47th president on Monday, taking charge as Republicans assume unified control of Washington and set out to reshape the country’s institutions.

See 10 of the week’s most interesting images from around the world, as selected by Washington Post photo editors.