Florence Nightingale was an English social reformer and statistician, and the founder of modern nursing. Nightingale came to prominence while serving as a manager of nurses trained by her during the Crimean War, where she organised the t...

Alexander II was the Emperor (tsar) of Russia from 1855 until his assassination. He was also the Grand Duke of Finland. He was born the eldest son of Nicholas I of Russia and Charlotte of Prussia, daughter of Frederick William III of Prussi...

Karl Heinrich Marx was a German philosopher, economist, sociologist, historian, journalist, and revolutionary socialist. Marx's work in economics laid the basis for the current understanding of labour and its relation to capital, and has in...

Charlotte Brontë was an English novelist and poet, the eldest of the three Brontë sisters who survived into adulthood and whose novels have become classics of English literature. She first published her works (including her best known novel...

Søren Aabye Kierkegaard was a profound and prolific writer in the Danish "golden age" of intellectual and artistic activity. His work crosses the boundaries of philosophy, theology, psychology, literary criticism, devotional literature and...

English poet Robert Browning was born in a suburb of London on May 7, 1812. He wrote his first book of poetry at the age of twelve, and was fluent in four languages by the age of fourteen. At sixteen, he began his studies at University Coll...

Louis-Napoléon Bonaparte was the first President of the French Second Republic and, as Napoleon III, the Emperor of the Second French Empire. He was the nephew and heir of Napoleon I. He was the first President of France to be elected by a...

John Brown was a white American abolitionist who believed armed insurrection was the only way to overthrow the institution of slavery in the United States. During the 1856 conflict in Kansas, Brown commanded forces at the Battle of Black Ja...

Honoré de Balzac was a French novelist and playwright. The novel sequence La Comédie Humaine, which presents a panorama of post-Napoleonic French life, is generally viewed as his magnum opus. Owing to his keen observation of detail and u...

Ferdinand Victor Eugène Delacroix was the most important of the French Romantic painters. Delacroix's use of expressive brushstrokes and his study of the optical effects of colour profoundly shaped the work of the Impressionists, while his...

James Buchanan, 15th President of the United States (1857-1861). In the 1850s, the question of slavery divided the United States. Hopes ran high that the new President, "Old Buck," might be the man to avert national crisis. He failed entire...

Samuel Finley Breese Morse was an American painter and inventor. After having established his reputation as a portrait painter, in his middle age Morse contributed to the invention of a single-wire telegraph system based on European telegra...

Augustin-Jean Fresnel was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton's corpuscular theory, from the late 1830s until the...

John James Audubon (Jean-Jacques) was a French American ornithologist, naturalist, and painter. He was notable for his expansive studies to document all types of American birds and for his detailed illustrations that depicted the birds in t...

Johann Carl Friedrich Gauss was a German mathematician, who contributed significantly to many fields, including number theory, algebra, statistics, analysis, differential geometry, geodesy, geophysics, electrostatics, astronomy, Matrix theo...