The couple met the survivors at the Invalides military hospital in Paris before viewing world-renowned Impressionist artworks by Claude Monet and Edgar Degas at the Musee d'Orsay.
They also watched France play Wales in a Six Nations rugby match at the Stade de France later in the day as the royal couple wrapped up their first official visit to the city where William's mother Diana died in a car crash 20 years ago.
But it was a reminder that France remains on high alert for attacks. More than 230 people have been killed by jihadists since January 2015.
At the Invalides hospital, William and Kate were clearly touched by the plight of 25-year-old Jessica Bambal Akan, who was seriously injured in the deadliest attack to hit France, the coordinated shootings and suicide bombings in eastern Paris on November 13, 2015 that left 130 people dead.
"We are all lucky to be alive," she told the royals.
Noticing the pleated and patterned Chanel dress that Kate was wearing, she told her she was determined to pursue a career in fashion despite her injuries.
"I am ambitious, I am still ambitious. I need to live and to work. I want to show these men they cannot win," she said.
"They (the attackers) started shouting at the audience and opened fire," he said.
"Anyone who shouted was shot, so I tried to be as quiet as possible.
"I was hit twice in the leg but lay there and kept quiet."
Ninety people were killed at the Bataclan.
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