The US president said it was a 'very great honour' to meet the Pope

Pope Francis and US President Donald Trump spent 30 minutes speaking privately in the library of the Apostolic Palace May 24, and as the president left, he told the Pope, “I won’t forget what you said.”

The atmosphere at the beginning was initially formal, however, the mood lightened when Pope Francis met the first lady, Melania Trump, and asked if she fed her husband “potica”, a traditional cake in Slovenia, her homeland. There were smiles all around.

Pope Francis gave Trump a split medallion held together by an olive tree, which his interpreter told Trump is “a symbol of peace.”

Speaking in Spanish, the Pope told Trump, “I am giving you this because I hope you may be this olive tree to make peace.”

The president responded, “We can use peace.”

Following the meeting President Trump tweeted that he was “more determined than ever to pursue peace in our world”.

Pope Francis also gave the president a copy of his message for World Peace Day 2017 and told him, “I signed it personally for you.” In addition, he gave Trump copies of his documents on “The Joy of the Gospel,” on the family and “Laudato Si'” on the environment.

Knowing that Pope Francis frequently has quoted Martin Luther King Jr, Trump presented Pope Francis will a large gift box containing five of the slain civil rights leader’s books, including a signed copy of The Strength to Love.

“I think you will enjoy them,” Trump told the Pope. “I hope you do.”

First Lady Melania Trump dressed in black and wore a mantilla when meeting the Pope (CNS)

After meeting the Pope, Trump went downstairs to meet Cardinal Pietro Parolin, Vatican secretary of state, and Archbishop Paul Gallagher, the Vatican foreign minister. He was accompanied by Rex Tillerson, US secretary of state, and HR McMaster, his national security adviser. The meeting lasted 50 minutes.

The Vatican described the president’s meetings with both the Pope and with top Vatican diplomats as consisting of “cordial discussions,” with both sides appreciating “the good existing bilateral relations between the Holy See and the United States of America, as well as the joint commitment in favor of life, and freedom of worship and conscience.”

“It is hoped that there may be serene collaboration between the state and the Catholic Church in the United States, engaged in service to the people in the fields of healthcare, education and assistance to immigrants,” the Vatican said.

The discussions also included “an exchange of views” on international affairs and on “the promotion of peace in the world through political negotiation and interreligious dialogue, with particular reference to the situation in the Middle East and the protection of Christian communities.”

Because of the Pope’s weekly general audience, Pope Francis and Trump met at 8.30am, an unusually early hour for a formal papal meeting. The early hour meant Pope Francis still could greet the thousands of pilgrims and visitors waiting for him in St Peter’s Square.

President Trump is welcomed by the prefect of the papal household Archbishop Georg Gaenswein (Getty images)

Many of those pilgrims, though, had a more difficult than normal time getting into the square. Security measures were tight with hundreds of state police and military police patrolling the area and conducting more attentive searches of pilgrims’ bags.

Reaching the St. Damasus Courtyard of the Apostolic Palace, where the US flag flew for the morning, Trump was welcomed by Archbishop Georg Ganswein, prefect of the papal household, and a formation of 15 Swiss Guards.

Accompanied by the archbishop up an elevator and down a frescoed hallway, the president passed more Swiss Guards in the Clementine Hall.

Although President Trump and Pope Francis are known to have serious differences on issues such as immigration, economic policy and climate change, the Pope told reporters 11 days before the meeting that he would look first for common ground with the US leader.

“There are always doors that are not closed,” the pope told reporters May 13. “We have to find doors that are at least a little open in order to go in and speak about things we have in common and go forward.”

After leaving the Vatican, President Trump was driven across Rome for meetings with Italian President Sergio Mattarella and Prime Minister Paolo Gentiloni.

Meanwhile, the First Lady went to the Vatican-owned Bambino Gesu children’s hospital — right next door to the Pontifical North American College, which is where US seminarians in Rome live. President Trump’s daughter, Ivanka, went to the Community of Sant’Egidio, a Catholic lay movement, for a meeting on combating human trafficking.