Soldier, spy, diplomat, writer, adventurer, chiefly remembered from his autobiography, Histoire de ma vie, which has established his reputation as the most famous erotic hero. However, Casanova's memoirs are more than an account of his sexual encounters with 122 women (according to his own count); they also provide an intimate and satirical look at the manners and life in the 18th century. His countless projects, employments, and initiatives took Casanova through the courts of Europe – in Paris he was employed to do some espionage work by Louis XV and from London he tried to sell the secret of a cotton red dye to his own country.

Today, under the Republican government, eloquent orators and learned writers have already convinced all Europe that they will raise French to a pitch of beauty and power which the world has not yet seen in any other language. In the short space of five years it has already acquired some hundred words which are amazing either for their sweetness or their majesty or their noble harmony. Is it possible, for example, to invent anything more beautiful in the realm of language than ambulance, Franciade, monarchien, sansculottisme? Long live the Republic! A body without head cannot possible commit follies. (from 'Preface,' in History of My Life: Volumes 1 and 2 by Giacomo Casanova, translated into English in accordance with the original French manuscript by Willard B. Trask, with an introduction by the translator, New York: Harcourt, Brace & World, 1966, p. 37)

Giacomo Casanova was born in Venice. His father, Gaetano Casanova was an actor, a low ranking job in society, but he also directed some plays. He had married in 1724 Giovanna Maria (Zanetta) Farussi, an actress, and a perfect beauty. Her father, so it was said, died of shame within a month of the wedding. Casanova himself claimed that his real father was a theatre-owner called Michele Grimani,a descendant of a Spanish nobleman.

In his childhood Casanova suffered from nose bleeds, and his parents thought that he would not live long. Casanova's illness puzzled doctors, he was extremely weak. "One said that all my chyle turned to blood; another maintained that the air I breathed must increase the blood in my lungs by a certain amout at each respiration, and that this was why I always kept my mouth open." (Ibid., p. 48) Strong women dominated Casanova's life: his mother and a witch who helped him to stop the bleeding. Later in his life he occasionally dressed himself as a woman.  According to Casanova, he was 5 feet 9 inches tall.

Casanova's parents left him in the care of his maternal grandmother, Marzia Farussi, and went off to London. Zanetta and Gaetano returned to Venice in 1728. Casanova's father died in 1733 but Zanetta turned down all her suitors and decided to support her children on her own. However, she soon left Venice and ended in Dresden, where she was a member of the Comici Italiani ensemble.

From early on, Casanova showed extraordinary cleverness, and in spite of his humble background, he was able to receive a good education. According to History of My Life, he learned to read in a less than a month. With the help of Abbé Grimani, the brother of his true father, Casanova was sent in 1734 to live with Doctor Gozzi in Padua. He studied at the University of Padua and at the seminary of St. Cyprian from where he was expelled for scandalous conduct. Casanovahe felt an "unconquerable aversion" to the legal profession, and drinking and love affairs ended his plans to become a priest, but he never gave up his belief in the existence of an immortal God, "and what proves to me that I have never doubted it is that I have always counted upon his providence, turning to him through prayer in all my tribulations and always finding my prayers granted." (Ibid., p. 25)

Casanova served in the army for some time – initially he was attracted by the smart uniforms –, played violin, but not very successfully, and worked for the lawyer Manzoni. In 1742 he received his doctorate from Padua. A few years later he became a secretary to Cardinal Acquaviva of Rome, but a scandal again forced Casanova to leave the city and he traveled in Naples, Corfu, and Constantinople. Eventually he settled in Venice, where he had a love affair with Signora F.  In 1746 he was a violinist in the San Samuel theater.

Until the last decade of his life, Casanova enjoyed good health  – he was five feet nine inches and he had a very dark skin. He contracted his first venereal disease in adolescence and the pox, gonorrhea, "Celtic humors," and other venereal diseases marked different periods of his life. He also learned the rudiments of medicine and when sick he recovered by following a strict diet of nitrate water for six weeks. Although his sex life was very lively, he did not enjoy orgies, which were popular among the high society. His nickname was "Monsieur Six-fois". Once he said: "Real love is the love that sometimes arises after sensual pleasure: if it does, it is immortal; the other kind inevitably goes stale, for it lies in mere fantasy." (quoted in Casanova: The Adventurous Life and Legacy of the World’s Most Famous Womanizer by Charles River Editors, 2017)

Casanova met in 1749 his great love, the young and mysterious Frenchwoman, Henriette, in Cesena. "Those who believe that a woman is not enough to make a man equally happy all the twenty-four hours of a day have never known an Henriette," he said. (quoted in Casanova's Women: The Great Seducer and the Women He Loved by Judith Summers, London: Bloomsbury, 2006, p. 136) Henriette left him, returned to her family, and Casanova remembers it in his autobiography as one of the saddest moments in his life. "What is love?" he asked, and compared love to an incurable illness and divine monster. He went to Lyons, where he was received as a Freemason. By 1750 he had worked as a clergyman, secretary, soldier, and violinist in several countries.

Suspected by the Inquisition, Casanova traveled from town to town – to Paris, Dresden, Prague, and Vienna, and then to Venice. In Dresden he translated the opera Zoroastre into Italian and his mother had the role of Erinice in the play. With François Prévost d'Exiles he wrote a play,  Les Thessaliennes, which had four performances at the Comédie-Italienne in Paris in 1752. His parody of Racine's The Thébaïde, was performed in Dresden in 1753.

Casanova's freedom ended in 1755 for a year. He was arrested, his manuscripts, books, works on magic, and Arentino's book on sexual positions were seized. Casanova was denounced as a magician and sentenced for five years in the lead chambers under the roof of the Doge's Palace. His cell was so low that he could not stand upright; it was like a giant baking oven during summers and an ice-box during cold winters. He managed to escape with his friend, Father Balbi, on October 31, 1756, with the help of a makeshift rope made of sheets, napkins and his mattress cover, tied together.  Casanova made his way to Paris, where his escape made him a celebrity.

Like Dostoevsky later on, Casanova was a gambler, but with the difference that he was lucky at cards. In 1757 he introduced the lottery; this invention made him a millionaire. He also established a workshop for manufacturing printed silk, hiring twenty young girls to do the work. From the marquise D'Urfé he cheated huge sums of money.

During his years in exile Casanova came in contact with such luminaries as Louis XV, Rousseau, and Mme. Pompadour. In 1760 he fled from his creditors and traveled across Europe. Casanova continues his adventures in Naples, England, Germany, and Spain. While in London, a courtesan named Marianne Charpillon stole all his money. Moreover, she had refused to go to bed with him. To get revenge, Casanova bought a parrot and trained it to recite "Miss Charpillon is more of a whore than her mother." The parrot nearly got sued for libel.

From Ausburg Casanova wrote a letter to Prince Charles of Courlande on the subject of fabricating cold. For Pietro Rossi's troupe of actors in Genoa he translated Voltaire's Le Café ou l'Ecossaise. Originally the comedy had been published in 1760 as a translation from the English of a "M. Hume". Voltaire did not like Casanova's achievement, who was so offended that he became the sworn enemy of the great Voltaire. In the 1770s  he wrote, in Italian, the well-documented La Istoria delle turbolenze della Polonia (History of Unrest in Poland). While in France in 1770, Casanova briefly met the famous magician and counterfeiter Giuseppe Balsamo, known as the Count Alessandro di Cagliostro, as he was journeying through Aix-en-Provence with his wife. Both were dressed as pilgrims.

Between 1774 and 1782 Casanova served as a spy for the Venetian inquisitors of state. His literary efforts did not meet success. In 1787 Casanova met Mozart in Prague, and attended the first performance of the opera Don Giovanni, formally titled Il dissoluto punito, ossia il Don Giovanni (The Rake Punished, or Don Giovanni), at the Teatro di Praga. The libretto was written by Lorenzo Da Ponte, but Casanova had earlier told the composer some episodes of his life. In one text Casanova sees that women are responsible for Don Giovanni's evil deeds: "The blame lies entirely with the female sex for bewitching his mind and enslaving his heart. Oh, seducing sex! Source of pain!" (Casanova: The World of a Seductive Genius by Laurence Bergreen, New York: Simon  & Schuster, 2016, p. 448) He attended the performance of the play in October 1787 at the Theatro di Praga.

Casanova wrote seven issues of Opuscoli miscellenei, ten of Le Messager De Thalie, one of Talia, an adaptation of a novel by Mme de Tencin, and The Siege of Calais. His novel,  Nè amori nè donne: ovvero, La stalla ripulita, sent him into a second exile. In Prague he published  Le soliloque d'un penseur, a denunciation of Cagliostro and Saint-Germain. The history of his flight from "The Leads" came out in 1788.

From 1785 Casanova spent as a librarian in the service of the Count of Waldstein in the castle of Dux, Bohemia (now Duchcov, Czech Republic). During his last years the toothless Casanova concentrated on his memoirs "to keep from going mad or dying of grief". Casanova finished the twelfth volume in 1792, with his age at forty-seven years. He also tried to find a solution to the famous old problem of the duplication of the cube. His physician, James Columb O'Reilly, had advised him: "For several months you must give up gloomy studies which tire the brain, and sex; for the time being you must be lazy, and, as a kind of relief, you might review the happy days spent in Venice and other parts of the world. I beg you, preserve as much of your life as you can for the public good." (Casanova: The Man Who Really Loved Women by Lydia Flem, translated by Catherine Temerson, New York: Farrar, Straus & Giroux, 1998, p. 213)

Histoire de ma vie, written in French which he thought more sophisticated than Italian or his own Venetian diaclect, tell the story of Casanova's life until 1744. They give a colorful picture of the culture of the 18th century Europe. The original manuscript, sold by Casanova's family to the German firm of F.A. Brockhaus in 1821, was not released until 1960. During the Second World War, the Leipzig offices of Brockhaus were hit by an Allied bomb, but a meember of the Brockhaus family managed to save the manuscript. Before the first unexpurgated version, most translations and other editions were based on a 28-volume German translation (1822-1828) and a highly inaccurate French edition (1838). The integral French text was first published as Histoire de ma vie in 1960-1962. The first full English edition was translated by W.R. Trask in six volumes (1966-71).

Casanova died on June 4, 1798. He had suffered from bladder trouble for three-and-a-half months. Among his lady friends were Cecile von Roggendorf, a twenty-two-year-old canoness, and Elise von der Recke, who sent him soup and wine from her own sickbed. Casanova wrote Elise poetry. "Bear witness that I have lived as a philosopher and die as a Christian," were Casanova's  improbable words on the morning of his death. (Famous Last Words: The Ultimate Collection of Finales and Farewells by Laura Ward, London: PRC 2004, p. 25)

A prolific writer, Casanova also published verse, translation of the Iliad, a satirical pamphlet on Venetian aristocracy, and an utopist novel L'Icosameron, where brother and sister spend 81 years inside the Earth, meet strange creatures called Mégamigres, and mate in the new Eden. The novel, dedicated to Count Waldstein, occupies 5 volumes, and was probably influenced byVoltaire's Micromégas and Ludvig Holberg's Nicolaii Klimii Iter Subterraneum (A Journey to the World Underground). 

Casanova's unpublished works include Essai de critique sur les moeurs, sur les sciences et sur les arts (Critical Essay on Morals, Sciences, and Arts); Lucubration sur l'Usure (Lucubration on Usury); and Reverie sur la Mesure moyenne de notre Année, selon la Réformation Grégoire (Reflections on the Common Reckoning of Our Year According to the Gregorian Reform). At his death he left behind some 8,000 pages of other manuscripts.

For further reading: Giacomo Casanova, His Life and Memoirs, ed. George Dunning Gribble (1929); The Other Casanova by Paul Nettl (1949); Casanova: A New Perspective by J. Rivers Childs (1960); Casanova by John Masters (1969); Life of Casanova by Mitchell Buck (1977); The Quadrille of Gender: Casanova's Memoirs by Francois Roustang (1988); The Man Who Really Loved Women by Lydia Flem (1997); Casanova in Love by Andrew Miller (1998 - note: fictional story of Casanova in London); Casanova: His Known and Unknown Life by Endore Guy (2001); Casanova and His Time by Edouard Maynial (2003); Casanova: The World of a Seductive Genius by Laurence Bergreen (2016); Casanova: Enlightenment Philosopher, edited by Ivo Cerman, Susan Reynolds and Diego Lucci (2016); Casanova: the Seduction of Europe, edited by Frederick Ilchman, et al. (2017); Conversations with Casanova: a Fictional Dialogue based on Biographical Facts by Derek Parker; foreword by Dita Von Teese (2019); Casanova: le moraliste et ses masques by Séverine Denieul (2020); Adventurer: The Life and Times of Giacomo Casanova by Leo Damrosch (2022); Casanova: un générateur de hasard by Alain Boureau (2022); Casanova by Alessandro Marzo Magno (2023)

Selected works:

• Zoroastro, 1752 (libretto; translator)
• Confutazione della Storia del Governo Veneto d'Amelot de la Houssaie, 1769 (3 vols.)
• Lana caprina, 1772
• La Istoria delle turbolenze della Polonia, 1774 (3 vols.)
•  Dell'Iliade di Omero tradotta in ottava rima, 1775  (3 vols.; translator)
•  Scrutinio del libro "Eloges de M. de Voltaire par différents auteurs", 1779
• Il duello, 1780
  - The Duel  (translated by James Marcus, 2011)
• Lettere della nobil donna Silvia Belegno alla nobildonzella Laura Gussoni, 1780 (ed. Folco Portinari, 1975)
• Le messager de Thalie, 1780-81
• Soliloque d'un penseur, 1786
• Histoire de ma fuite des prisons de la République de Venise qu'on appelle les Plombs, 1787 - The Escapes of Casanova and Latude from Prison (ed. P. Villars, 1894)
• Icosameron ou histoire d'Edouard, et d'Elisabeth qui passèrent quatre vingts ans chez les Mégramicres habitante aborigènes du Protocosme dans l'interieur de notre globe, 1788 (5 vols.) - Casanova's "Icosameron", or, The Story of Edward and Elizabeth who spent Eighty-One Years in the Land of the Megamicres, Original Inhabitants of Protocosmos in the Interior of the Globe (translated and abridged by Rachel Zurer, 1986)
• Solution du probleme deliaque démontrée par Jacques Casanova de Seingalt, 1790
• Corollaire a la duplication de l'Hexaedre donée a Dux en Boheme, 1790
• Demonstration geometrique de la duplicaton du cube, 1790
• Le Polemoscope, 1791
• A Leonard Snetlage, Docteur en droit de l'Université de Gottingue, 1797
• Mémoires de J. Casanova de Seingalt, 1826-38 (12 vols.) - The Memoirs of Jacques Casanova de Seingalt, The Prince of Adventurers (2 vols.,  new and abridged ed., 1902) / The Memoirs of Jacques Casanova (edited by Madeleine Boyd, 1929) /  Casanova’s Escape from the Leads: An Excerpt from the Memoirs of Giacomo Casanova di Seingalt  (tr. Arthur Machen, 1925) / The Memoirs of Jacques Casanova de Seingalt, 1725-1798 (8 vols., tr. Arthur Machen, 1938) / Memoirs (6 vols., tr.   Arthur Machen, 1951-61) / The Story of My Life (translated by Stephen Sartarelli and Sophie Hawkes, 2001) - Casanovan vaellusvuodet (suom. Maija Westerlund, 1959)
• Les connaissances mathématiques de Jacques Casanova de Seingalt, 1882
  
• L'oeuvre de Casanova de Seingalt, 1921 (2 vols.)
• Le messager de Thalie: onze feuilletons inédits de critique dramatique ; Le précis de ma vie...., 1925
• La dernière amie de Jacques Casanova: lettres de Cécile de Roggendorff, 1797-1798, d'après une correspondance inédite, 1926
• Lana Caprina: Lettre d'un lycanthrope, Correspondance inédite de J. Casanova, L'intermédiaire des Casanovistes, 1926
• Soliloque d'un penseur: correspondance inédite (1773-1783, 1926 (ed. Édouard Maynial)
• Casanova chez Voltaire, 1929 (ed. Henri de Régnier)
• Caro mio don Giacomo: Réflexions, notes de voyages, portraits, paradoxes et maximes morales, 1946 (ed. Jean-Francois Laya)
• Histoire de ma vie, 1960-62 (12 vols., a definitive edition) - History of My Life (12 vols., tr. Willard R. Trask, 1966-1971) - Elämäni tarina. 1-2 (suomentanut Seppo Sipilä, 2019); Elämäni tarina. 3-4 (suomentanut Seppo Sipilä, 2020); Elämäni tarina 5-6 (suomentanut Seppo Sipilä, 2021)
  
• Casanova en verve, 1973 (ed. Robert Abirached)
• Examen des "Etudes de la Nature" et de "Paul et Virginie" de Bernardin de Saint Pierre, 1985 (written 1788/89; ed. Marco Leeflang and Tom Vitelli)
• Lettere a un maggiordomo, 1985 (ed. Piero Chiara, tr. Carlo Martini)
• Pensieri libertini, 1990 (ed. Federico di Trocchio)
  
• Lana caprina. Epistola di un licantropo, 1991 (ed. Renato Giordano)
• Philocalies sur les sottises des mortels, 1993 (ed. Tom Vitelli)
  
• Histoire de ma vie: suivie de textes inédits, 1999 (12 vols. in 3, ed. Francis Lacassin)
• I pensieri di Casanova: vademecum del libertino contemporaneo, 2006 (edited by Francesco Paolo Sgarlata)
  
• Histoire de ma vie, 2013-2015 (édition établie sous la direction de Gérard Lahouati et Marie-Françoise Luna; avec la collaboration de Furio Luccichenti et Helmut Watzlawick)