Erdoğan was also expected to meet with Cardinal Pietro Parolin, the Vatican's secretary of state.
Before his departure from Turkey, Erdogan said he and Vatican leaders would discuss Palestine, Jerusalem, Syria, Iraq, counterterrorism, refugee issues and humanitarian aid.
The Turkish leader is also due to meet Italian President Sergio Mattarella and Prime Minister Paolo Gentiloni on Monday, as well as local business leaders.
2 dead, more than 100 hurt in SC Amtrak crash
The Lexington County sheriff later said four buses had been made available to take Amtrak passengers to their final destinations. The National Transportation Safety Board sent investigators. "The CSX was on the track it was supposed to be on", McMaster said.
Francis and Erdogan last met in 2014 during the pope's visit to Turkey.
Both the Turkish and Vatican sides described the private talks as cordial.
They declared Trump's decision "null and void legally" and "a deliberate undermining of all peace efforts" that would give impetus to "extremism and terrorism".
After the meeting, the Pope gave Mr Erdogan a bronze medallion showing an angel embracing the world while battling a dragon.
Pope Francis and later the European Union in 2015, the massacre's centennial, were trying to encourage Turkey "to recognize the Armenian genocide and thus pave the way for a genuine reconciliation between Turkish and Armenian peoples".
A Vatican statement issued following the meeting said discussions focussed on the "situation in the Middle East, with particular reference to the status of Jerusalem highlighting the need to promote peace and stability in the region through dialogue and negotiation, with respect for human rights and global law".
Police earlier said around 150 people took part in the authorised demonstration, organised by Italy's Kurdistan Network, in the gardens of Castel Sant'Angelo, outside the "green zone" cordoned off by police in central Rome. Several also held signs calling for the release of Abdullah Öcalan, a Kurdish nationalist leader who has been jailed in Turkey since 1999. A protester was hurt and two were arrested. At least one demonstrator was injured, a witness told Reuters.
"In Afrin, a new crime against humanity is underway", said a Kurdish association based in Italy.
Finance 'no issue' for health scheme
Niti Aayog CEO Amitabh Kant said the challenge is not resources for the scheme but challenge is its implementation. Nadda did not elaborate on the modalities of how the government proposes to go about implementing the scheme.
North and South Korea's ice hockey team lose in debut
Moon is known to be hoping that the US and North Korea could hold talks in the South when their high-ranking officials visit here. Twenty-two North Korean athletes will compete in the Olympics , including 12 who will play in a unified women's ice hockey team.
Oil production exceeds 10 million barrels a day
They are also perhaps an indication that the coalition may be willing to adjust its cuts to respond to tightness in some markets. The indicator was significantly higher than analysts' forecasts, which expected the stock to grow by only 126,000 barrels.
'Jackpotting' scheme at ATMs now happening in US
The compromised ATMs can dispense up to 40 bills every 23 seconds- tens of thousands of dollars from a single ATM. Over the past few years, jackpotting has been a rising threat across the globe, particularly in Europe and Asia.
At least 17 killed, 110 wounded in Afghan auto bomb attack
Thick, dark smoke can be seen rising into the sky following a loud explosion near the old Interior Ministry building Saturday. Wounded people are assisted at the site of an explosion in downtown Kabul, Afghanistan , Saturday, Jan. 27, 2018.