French President Emmanuel Macron met International Olympic Committee (IOC) counterpart Thomas Bach in the rain here today for a tour of the Olympic Museum on the eve of a key presentation to showcase Paris' bid for the 2024 Games.
Delegations from the French capital and sole rival Los Angeles each toured the museum before Bach and one designated bid delegation leader provided a short speech.
Both cities will present to the IOC tomorrow in a closed Candidate City Briefing before an Extraordinary IOC Session at which plans to award both the 2024 and 2028 Olympic Games this year are expected to be approved.
Paris is widely expected to receive the 2024 edition while Los Angeles is considered more likely to play host in 2028.
Los Angeles, up first on the tour, enjoyed sunny weather here as Mayor Eric Garcetti emphasised how they are the first Olympic bid to be labelled as "cool" by the IOC in their Evaluation Commission report published last week.
"We welcome the Executive Board's decision to welcome the simultaneous awarding of two successive editions of the Summer Games," he said.
"This is, as you see, a win-win-win, and we are very excited, even in that context, to be sharing our unique story with the entire membership of the IOC tomorrow."
Garcetti singled out the Los Angeles 1984 exhibits in the museum as those Olympics had "inspired his love for sport".
There was no doubt whose visit was generating more attention, though, as Macron arrived an hour later alongside his wife Brigitte amid a frenetic security operation.
The sun turned to rain, and even brief ripples of thunder, as the President helped carry the wheelchair of French Paralympic and Sports Committee President Emmanuelle Assmann down the steps for a photo.
Both he and Bach then spoke purely in French.
Macron emphasised the bid's commitment to aspects including security before citing the importance of the Olympic concept.
"In this troubled world, we come to you with pride, determination and humility," he said.
"The Olympic values is what the world needs - more multilateralism."
Macron will now lead Paris' presentation team tomorrow after participating in a full rehearsal on his arrival today.
Both he and Garcetti will first attend an official IOC Session dinner this evening.
If joint awarding plans are approved, both the 2024 and 2028 Games will be awarded on September 13 in Lima.