Percy Bysshe Shelley was one of the major English Romantic poets, and is regarded by some as among the finest lyric poets in the English language, and one of the most influential. A radical in his poetry as well as in his political and soci...

Simón Bolívar was a Venezuelan military and political leader. Together with José de San Martín, he played a key role in Hispanic-Spanish America's successful struggle for independence from the Spanish Empire, and is today considered one of...

In 1811 Amedeo Avogadro hypothesized that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules. From this hypothesis it followed that relative molecular weights of any two gases are the same as the...

Meriwether Lewis was an American explorer, soldier, and public administrator, best known for his role as the leader of the Lewis and Clark Expedition also known as the Corps of Discovery, with William Clark, whose mission was to explore the...

Sir Walter Scott was a Scottish historical novelist, playwright, and poet. Scott was the first English-language author to have a truly international career in his lifetime, with many contemporary readers in Europe, Australia, and North A...

William Clark was an American explorer, soldier, Indian agent, and territorial governor. A native of Virginia, he would also grow up in pre-statehood Kentucky before later settling in what later became the state of Missouri. Along with Meri...

Napoleon Bonaparte was a French military and political leader who rose to prominence during the latter stages of the French Revolution and its associated wars in Europe. As Napoleon I, he was Emperor of the French from 1804 to 1814 and a...

Louis Delgrès was a leader of the movement in Guadeloupe resisting reoccupation (and thus the reinstitution of slavery) by Napoleonic France in 1802. Delgrès was mulatto, born free in Saint-Pierre, Martinique. A military officer for Rev...

William IV was King of the United Kingdom of Great Britain and Ireland and of Hanover from 26 June 1830 until his death. William, the third son of George III and younger brother and successor to George IV, was the last king and penultimate...

George IV was the king of Hanover and the United Kingdom of Great Britain and Ireland from the death of his father, George III, on 29 January 1820 until his own death ten years later. From 1811 until his accession, he served as Prince Regen...

Thomas Telford was a Scottish civil engineer, architect and stonemason, and a noted road, bridge and canal builder. Apprenticeship as a stonemason laid the basis for Telford's move via Edinburgh to London, where he worked on Somerset House...

Nicolas-Jacques Conté was a French painter, balloonist, army officer, and inventor of the modern pencil. He distinguished himself for his mechanical genius which was of great avail to the French army in Egypt. Napoleon called him “a univ...

Antonio Salieri is still better known today for the renowned composers with whom he was associated than for his own many and varied compositions. While he cannot be ranked among the great masters himself, he has nevertheless come into view...

Jean-Baptiste de la Marck, often just known as "Lamarck", was a French soldier, naturalist, academic and an early proponent of the idea that evolution occurred and proceeded in accordance with natural laws. In the modern era, Lamarck is re...

Jeremiah Dixon was an English surveyor and astronomer who is best known for his work with Charles Mason, from 1763 to 1767, in determining what was later called the Mason–Dixon line. Dixon was born in Cockfield, near Bishop Auckland, Cou...