The tradition of swearing the oath of office on a Bible stretches back to George Washington, but not all presidents have observed it.

Donald Trump raised his right hand while placing his left hand on the Bible Monday afternoon. He then took the oath of office and was sworn in as the 47th President of the United States.

Legally speaking, it doesn't matter whether the U.S. president placed his hand on a bible. And he wouldn't be the first not to.

Some social media users wondered if Donald Trump not taking the oath on a religious text meant he wasn't properly sworn in.

The language of the oath is stated in Article II, Section One, Clause 8 of the United States Constitution, and a new president must swear it before exercising or performing any official authorities or

Donald Trump has taken the oath of office to become the 47th president of the United States. During a ceremony inside the Rotunda of the US Capitol on Monday, 20 January, the Republican swore to "preserve,

Although it's done so often it seems like rule, is there a requirement to use a Bible during a swearing-in ceremony?

President Trump did not place his hands on a stack of Bibles while taking the oath of office Monday, but he did not violate the U.S. Constitution either.