To stabilize the region, European leaders said Iran "will bear responsibility for actions that jeopardize this opportunity for peace and stability."
France has deployed more than 45,000 police, 10,000 soldiers, and 2,000 private security agents, with snipers and drones watching over the whole city.
"As the prime minister of Israel, Netanyahu would be welcome to attend, as would any other head of state."
Qatar has also played an increasingly important role as a mediator - in January, Qatar and France brokered a deal with Israel and Hamas to deliver urgent medication to Israeli hostages.
After the NFP failed to win an absolute majority, years of tensions between the left-wing parties have resurfaced over who could run a possible left-wing government.
Marine Le Pen's National Rally party underperformed in the French parliamentary elections, while the left-wing alliance became the largest faction, leading to the Prime Minister's resignation.
If the nationalist, National Rally party secure a majority, it would usher in France's first far-right government since World War Two and send shockwaves through the European Union.