Images from the inauguration show President Trump did not put his hand on a Bible as he was sworn in by Supreme Court Chief Justice John Roberts. It is not required in the Constitution.

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.

During his 2017 inauguration, Trump placed his hand on a family Bible stacked atop Lincoln's while taking the oath. While reciting the presidential oath of office is mandated by the Constitution, using a Bible isn't. Trump is certainly not the first president to not use a Bible during the swearing-in ceremony.