"Trusting in the assistance of the almighty, I pledge to continue and strengthen the Church's dialogue and cooperation with the Jewish people in the spirit of the Second Vatican Council's declaration Nostra Aetate," Leo said in the letter.
Nostra Aetate was a landmark document in the 1962-1965 Council that repudiated the concept of collective Jewish guilt for the death of Jesus and urged dialogue with non-Christian religions.
The brief document revolutionized Catholic relations with Jews after centuries of persecution and mistrust. Dialogue that ensued over the following two decades made it possible for Pope John Paul II to become the first pontiff to visit a synagogue, giving a speech in Rome's main temple in 1986, where he called Jews "our beloved elder brothers."
After years of often tense relations, the Vatican and Israel signed a "fundamental agreement" in 1993 and exchanged full ambassadors the next year.
A Vatican source said Marans would attend Leo's inaugural Mass on Sunday. More than a dozen other Jewish leaders from around the world were also expected to attend, the source said.
It was not yet clear if any Israeli government leader would attend the Mass.
While the late Pope Francis often condemned antisemitism, relations between the Vatican and Israel soured after the start of the war in Gaza in 2023.
