The concept had been derided as overly ambitious and the location criticised as a prime security risk. But after years of preparation, France could Saturday breathe a sigh of relief -- it had pulled off the Olympic opening ceremony for the 2024 Paris Games.

Opting for a ceremony on the waters of the River Seine rather than the standard option of a stadium was a theatrical gesture typical of president Emmanuel Macron but which brought considerable risks.

The day was also far from ideal. It began with news of three attacks on signal infrastructure on the French railway network which will disrupt travel for the next days and raises the prospect of a coordinated bid by so far unknown individuals to upset the Games.

Meanwhile the weather conspired against organisers and spectators, with an unseasonable deluge drenching performers, athletes and onlookers protected by nothing more than plastic ponchos. But the show went on.