In his letter, Trump invited Orbán “to join me in a critically Historic and Magnificent effort to solidify Peace in the Middle East and, at the same time, to embark on a bold new approach to resolving Global Conflict!”

Trump noted that he presented his peace plan for Gaza in September, which was “quickly embraced by all World Leaders, including major Heads of State across the Arab World, Israel, and Europe.”

The UN Security Council announced its support for the plan in November, he said.

“Now it is time to turn all of these Dreams into reality,” Trump said.

“At the heart of the Plan is the Board of Peace, the most impressive and consequential Board ever assembled,” set up as a new international institution and a transitional governing body, he said.

“Our effort will bring together a distinguished group of nations ready to shoulder the noble responsibility of building LASTING PEACE, an Honor reserved for those who are prepared to lead by example,” Trump noted, adding that the board would soon hold its first meeting.

As chairman of the board, Trump said he was officially inviting Hungary to join as a founding member, Orbán to represent his country, “and become a party to the Charter of the Board of Peace”.

The 20-point US peace plan and the charter of the board was also attached to the letter.

“Looking forward to working with you … toward the goal of lasting WORLD PEACE, PROSPERITY AND GREATNESS,” Trump said.

In the Facebook post, Orbán said: “If there is Trump, there is peace! … Hungary’s peace efforts are recognised! President Trump has asked me to join the work of the Board of Peace as a founder. We naturally accepted the honor.”