Jean-Francois Champollion: Did you mean...?

A pastel portrait by Maurice Quentin de La Tour of the Swiss philosopher Jean-Jacques Rousseau (1712-1778). (Musée Antoine-Lécuyer, Saint-Quentin, France)

Jean-Paul Sartre (1905-1980) speaking at Freiburg University, photo by Willy Pragher, 1953. Landesarchiv Baden-Württemberg, Staatsarchiv Freiburg.

Portrait of Jean-Paul Marat (1743-1793), an activist, journalist and Jacobin leader during the French Revolution (1789-1799), oil on canvas by Joseph Boze, 1793. Musée Carnavalet, Paris.

A 1766 oil on canvas portrait by Allan Ramsay of the Swiss philosopher Jean-Jacques Rousseau (1712-1778). (Scottish National Gallery, Edinburgh)

A 19th-century portrait of the Franco-American pirate and privateer Jean Lafitte (c. 1780 - c. 1821). (Rosenberg Library, Galveston, Texas)

The tomb of the Swiss philosopher Jean-Jacques Rousseau (1712-1778). Pantheon, Paris.

An oil-on-canvas 1892 portrait by Eero Järnefelt of the Finnish composer Jean Sibelius (1865-1957). (Finnish National Gallery)

Jean-Baptiste Jourdan (1762-1833), 1st Count Jourdan, marshal of the empire, oil on canvas by Eugène Charpentier, mid-19th century. Palace of Versailles.

The tomb of the Finnish composer Jean Sibelius (1865-1957) at his former home Ainola in southern Finland.

Portrait of Jean-Baptiste de La Rochefoucauld, Duc d'Anville, painting by F. de Troy. The Duc d'Anville led an ill-fated military expedition to Nova Scotia during King George's War (1744-1748) to engage against the English and retake the...