Frederick I Barbarossa: Did you mean...?

George III of Great Britain (r. 1760-1820) was the third of the Hanoverian monarchs, and he remains the longest-reigning king in British history. His six decades on the throne saw the creation of the United Kingdom, the loss of the 13 American...

The Declaration of Pillnitz was a joint statement issued on 27 August 1791 by Leopold II, Holy Roman Emperor (r. 1790-1792) and King Frederick William II of Prussia (r. 1786-1797). The declaration appealed to all European powers to unite...

The Crusades were a series of military campaigns organised by popes and Christian western powers to take Jerusalem and the Holy Land back from Muslim control and then defend those gains. There were eight major official crusades between 1095...

The German Crusade of 1197 CE, also known as the 'Emperor's Crusade', was led by the Holy Roman Emperor Henry VI (r. 1191-1197 CE). Although the emperor died on his way east, his army did capture Beirut from the forces of the Ayyubid dynasty...

Catherine II of Russia (Catherine the Great) was empress regent of Russia from 1762-1796. She was born in Prussia to Prince Christian August of Anhalt-Zerbst (1690-1747) and Princess Johanna Elisabeth of Holstein-Gottorp (1712-1760), and...

Martin Luther (l. 1483-1546) was a German priest, monk, and theologian who became the central figure of the religious and cultural movement known as the Protestant Reformation. Even though earlier reformers had expressed Luther's views, his...

The Eighty Years' War (1568-1648, also known as The Dutch Revolt and Dutch War of Independence) was a military conflict between the seventeen provinces of the Netherlands and Spain, which then governed them, beginning in the reign of King...

Matilda of Canossa (c. 1046-1115), the Countess of Tuscany (r. 1055-1115) and Vice-Queen of Italy (r. 1111-1115), was the final head of the noble House of Canossa following the deaths of her father in 1052 and her elder brother in 1055. One...

Saint Thomas Aquinas (l. 1225-1274, also known as the "Ox of Sicily" and the "Angelic Doctor") was a Dominican friar, mystic, theologian, and philosopher, all at once. Although he lived a relatively short life, dying at age 49, Thomas occupied...

Katharina von Bora (l. 1499-1552, also known as Katherine Luther) was a former nun who married Martin Luther (l. 1483-1546) in 1525. She, along with some fellow nuns, escaped their convent with Luther's help in 1523 in response to his reform...