Here we take a closer look at what adorns the walls and some of the mementoes packed on to his desk.
1 The Nathan Hale patriot award, which was given to Mr Trump in 2015. The musket award honours Hale, an American soldier who was executed by the British in 1776 at the age of 21.
2 Humanitarian honour called Tree of Life given to Mr Trump by the Jewish National Fund in 1983.
3 America’s Cup Foundation Award. Mr Trump funded a US yacht in the competition, which dates back to 1851.
4 Photo of Mr Trump’s father, Frederick who died in 1999. He was a property magnate.
5 Multiple copies of Time Magazine, featuring Mr Trump as Person of the Year.
6 A car bumper sticker from Mr Trump’s presidential campaign, with his slogan ‘Make America Great Again’.
7 A bundle of copies of the Financial Times.
8 Beautiful Country, a novel by JR Thornton. A coming-of-age story set in modern day China centring on the friendship between an American and a Chinese boy who meet while training with Beijing’s Junior National Tennis Team.
9 A couple of copies of the CNN book Unprecedented on Mr Trump’s 2016 election victory.
Donald’s view on the world…
Donald Trump hinted he could use lifting sanctions against Moscow as an incentive to make the first major nuclear arms cut deal since Barack Obama’s 2010 treaty.
“Let’s see if we can make some good deals with Russia,” he said.
“I think nuclear weapons should be way down and reduced very substantially, that’s part of it.”
IRAQ, AFGHANISTAN AND SYRIA
Mr Tump said the US-led 2003 invasion of Iraq was “possibly the worst decision ever made in the history of our country”.
He described it as “like throwing rocks into a beehive”. He also said things were “not going well” in Afghanistan – but the US should have acted when President Assad used chemical weapons in Syria.
He defended his attack on “obsolete” Nato, saying it was designed “many, many years ago” and “wasn’t taking care of terror”.
Mr Trump also said not all members paid their “fair share” of the cost. But he added that Nato was “very important to me” and said Europe could continue to depend on America.
ANGELA MERKEL AND EUROPE
German Chancellor Angela Merkel made “a catastrophic mistake” said Mr Trump by admitting so many “illegals” from the Middle East and North Africa without security vetting. The European Union was also “basically a vehicle for Germany”, he said and added: “That’s why the UK was so smart in getting out.”
Mr Trump asked of the former UK Independence Party leader: “How is our Nigel doing?” The President-elect added: “I like him. I think he’s a great guy. He was very supportive. He was one of the earliest people that said Trump was gonna win.”
Theresa May has sent Mr Trump a copy of Winston Churchill’s 1941 Christmas Eve radio address to the American people following the Japanese attack on Pearl Harbor. The Prime Minister has expressed hopes the sentiment of “unity and fraternal association” shown by her wartime predecessor remained “as true today as it has ever been”.
TWITTER AND HOLIDAYS
Mr Trump vowed not to give up his incendiary @realDonaldTrump Twitter feed, despite calls to stop when he becomes President. And when asked about holidays, he replied: “Who wants to leave the White House?”