Gifts Trump and Pope Francis exchanged, including the pontiff's letter on the environment

Trump had an audience with the pope at the Vatican.

Francis gave Donald Trump a large medal by a Roman artist, inscribed with an olive branch, a symbol of peace.

Francis also gave Trump this year's "message of peace" with a personalized inscription.

"We can use peace," Trump said. "That's so beautiful. Thank you."

Other gifts from the pope included his three writings on family, the joy of the Gospel and "care of our common home, the environment," which he said he gives all Catholics.

"Well, I'll be reading them," Trump said.

"I think you will enjoy them," Trump told the pope.

The first-edition collection includes "Stride Toward Freedom," "The Measure of a Man," "Why We Can't Wait," "Where Do We Go From Here: Chaos or Community?" and "The Strength to Love," which has King's signature.

According to the White House, each book is "custom-bound and accented with gold hand tooling."

In addition to the books, Trump gave the pope a piece from the King monument in Washington, the "Stone of Hope," engraved with a quote, and a bronze sculpture of a floating lotus titled "Rising Above" by a Florida artist. The sculpture represents "hope for a peaceful tomorrow" the White House said.

Before parting ways, Trump thanked Francis and said, "I won't forget what you said."