PARIS — Giacomo Girolamo Casanova was a gambler, swindler, diplomat, lawyer, soldier, alchemist, violinist, traveler, pleasure seeker and serial seducer.

He was also a prolific writer who documented his adventures and love affairs in a steamy memoir that is one of the literary treasures of the 18th century.

Born in Venice, he considered France his adopted country but was forced to flee Paris in 1760 after seducing the wives and daughters of important subjects of King Louis XV and cheating them out of their money.

Now Casanova is back in France, celebrated by the French state. The original manuscript of his memoirs, “The Story of My Life,” and other writings of his are on display for the first time at the National Library of France in the exhibition “Casanova — The Passion for Freedom.” He is even being called a feminist....