Leo, the first US pope, will visit Lebanon's Christian community before hosting an inter-religious dialogue with members of Lebanon's Sunni Muslim, Shi'ite Muslim and Druze communities, as well as migrant workers.
The Pope, in the country on what he has described as a mission of peace, urged Lebanon's political leaders on Sunday to persevere with peace efforts despite facing a "highly complex, conflictual and uncertain" regional situation.
Leo, 70, is visiting Lebanon until Tuesday on the second leg of his first overseas trip, which started in Turkey.
He has a crowded itinerary on Monday. He visited the tomb of St Charbel, a Catholic saint revered across the region, and will attend the Shrine of of Our Lady of Lebanon.
Crowds gathered near the tomb early on Monday to greet him, carrying umbrellas to shield them from the rain and ululating as his convoy approached to the sound of church bells.
"We have really been waiting for the Pope's visit because it is raising our hope now. He has come to confirm for us that what we are living through, (that) it will not always be like this," said Reverend Toni Elias, a Maronite priest from Rmeich, a Christian town close to the Israeli border.
"And we believe that he brings with him the message of peace, which we really need."
Lebanon, which has the largest share of Christians in the Middle East, has been rocked by the spillover of the Gaza conflict, as Israel and the Lebanese Shi'ite Muslim militant group Hezbollah went to war, culminating in a devastating Israeli offensive.
The country, which hosts one million Syrian and Palestinian refugees, also is struggling to emerge from a severe economic crisis following decades of profligate spending that sent the economy into a tailspin in late 2019.
Leo will host a meeting with young people, where he is expected to urge them to work for peace in a country still being hit by near-daily Israeli bombardment.
Israel says its continued strikes since 2024's ceasefire agreement are to prevent Hezbollah re-establishing military capabilities and posing a renewed threat to communities in northern Israel.
His schedule includes a prayer at the site of a 2020 chemical explosion at the Beirut port that killed 200 people and caused damage worth billions.
He will also lead an outdoor mass on the Beirut waterfront and visit a psychiatric hospital, one of the few mental health facilities in Lebanon, where carers and residents are eagerly anticipating his arrival.
