Lebanon's caretaker prime minister returned home to Beirut on Friday, two days after a Hezbollah-led coalition toppled his Western-backed government.
Upon his arrival Saad Hariri met Prince Albert of Monaco, who is on a two-day visit to Lebanon.
Hariri has been trying to rally international support in the US, France and Turkey since ministers allied to the Shiite militant group resigned on Wednesday, bringing down his government.
He was meeting with US President Barack Obama on Wednesday when his government fell.
The crisis was the climax of long-simmering tensions over the UN tribunal investigating the 2005 assassination of Hariri's father, former Prime Minister Rafik Hariri.
The Imams of Friday prayer in Lebanon called upon all parties to remain calm and to maintain constructive dialogue.
The tribunal is widely expected to indict members of Hezbollah soon, which many fear could rekindle violence in the tiny nation plagued for decades by war and civil strife.
Hezbollah denounces the Netherlands-based tribunal as a conspiracy by the US and Israel.
It had demanded Hariri reject the tribunal's findings even before they came out, but Hariri has refused to break cooperation with the court and its investigations.
Hariri's office had no immediate comment on the outcome of his meetings abroad.
Turkish leaders were expected to propose holding an international conference to address the crisis and advise Hariri to try to seek a consensus with Hezbollah, private NTV television said Friday.
Hezbollah, already Lebanon's most potent military force, is now making a bid to expand its political power by installing an ally as prime minister.
Hezbollah's allies said it would be futile for Hariri to stay in the post, but politicians in the pro-Western coalition said there was no alternative to the 40-year-old billionaire Hariri, who remains the most popular choice among Sunni Muslims.
If Hezbollah succeeds, its patrons in Iran and Syria would have far more sway in the volatile corner of the Middle East - something Washington has worked to prevent.