Getty The two world leaders have never met, and it doesn't appear they will anytime soon.

President Donald Trump will visit Italy next month for a meeting with world leaders ― but one leader he isn’t seeking time with is Pope Francis.

Trump has not requested a meeting with the pope during his trip to Italy for the Group of Seven (G7) summit on May 26 and 27, according to a report from Reuters.

“The situation can change but there are only six weeks left so it looks unlikely at this point,” a diplomat, who spoke on the condition of anonymity, told Reuters.

The Vatican confirmed the Holy See had not received any requests from the White House for a meeting between the two men.

“The ball is on their side,” said one Vatican source. “We have received no request.”

U.S. presidents have historically sought out meetings with popes during trips to Italy and the rest of Europe, making Trump’s omission unusual. Francis and Trump have not previously met.

JEWEL SAMAD via Getty Images Hundreds of thousands of pilgrims turned out to see Pope Francis celebrate Mass in Philadelphia, Pennsylvania during the 2015 papal visit.

President Obama met Pope Francis twice ― once at the Vatican in 2014 and also during the pontiff’s trip to the United States in 2015. Obama also met with Francis’s predecessor, Pope Benedict XVI, at the Vatican in 2009.

Trump and Francis hold expressly opposing views on a number of key issues, including immigration policy and climate change. During Trump’s campaign for president, the pontiff criticized the Republican candidate’s plan to build a wall along the U.S.-Mexico border.

The new Pope is a humble man, very much like me, which probably explains why I like him so much! — Donald J. Trump (@realDonaldTrump) December 25, 2013

Speaking aboard his papal plane after visiting Mexico, the pope was asked about Trump’s proposal. “A person who only thinks about building walls, wherever they may be, and not building bridges, is not Christian,” he said, according to reporters who were on the plane with the pontiff.

Francis stressed that he wasn’t trying to tell Americans how to vote. “I am not going to get involved in that,” he said. But he added: “I would only say that this man is not Christian if he has said things like that.”

Trump responded in an interview with The New York Times: “For a religious leader to question a person’s faith is disgraceful.”

Steve Pope via Getty Images Pope Francis didn't mince words during Trump's presidential campaign.

The pope has been less pointed in his comments since Trump’s inauguration, but relations between the two have hardly warmed.

In his first official telegram to Trump in January, Francis said: “Under your leadership, may America’s stature continue to be measured above all by its concern for the poor, the outcast and those in need.”

He then referred to the parable of Lazarus, a poor man who suffered greatly while he lived on earth but who was taken to heaven when he died. Lazurus is often compared to his neighbor, a “rich man” who lived a life of luxury on earth, but who was sent to Hades after death.

“At a time when our human family is beset by grave humanitarian crises demanding far-sighted and united political responses, I pray that your decisions will be guided by the rich spiritual and ethical values that have shaped the history of the American people and your nation’s commitment to the advancement of human dignity and freedom worldwide,” the pope wrote to Trump.