Frederick I: Did you mean...?

Tycho Brahe (1546-1601) was a Danish nobleman who made the most significant contribution to our knowledge of astronomy before the telescope arrived. He discovered a supernova, observed the elliptical interplanetary orbit of a comet, updated...

The Crusader States (aka the Latin East or Outremer) were created after the First Crusade (1095-1102) in order to keep hold of the territorial gains made by Christian armies in the Middle East. The four small states were the Kingdom of Jerusalem...

The War of the Sixth Coalition (1813-1814), known in Germany as the Wars of Liberation, was the penultimate conflict of the Napoleonic Wars (1803-1815). The Sixth Coalition, which included Russia, Austria, Prussia, the United Kingdom, Sweden...

William Still (1819-1902) was an African American abolitionist known as the "Father of the Underground Railroad" for his efforts in helping to free between 600 to 800 people from slavery. Born the son of formerly enslaved parents, Still devoted...

The German Peasants' War (1524-1525) was a conflict between the lower class of the Germanic region of the Holy Roman Empire and the nobility over the feudal system of serfdom, religious freedom, and economic disparity. It was later characterized...

George I of Great Britain (r. 1714-1727) succeeded the last of the Stuart monarchs, Queen Anne of Great Britain (r. 1702-1714) because he was Anne's nearest Protestant relative. The House of Hanover secured its position as the new ruling...

Gustavus Adolphus (l. 1594-1632; r. 1611-1632) was the King of Sweden who elevated his country to a major power in the 17th century. He also is traditionally recognized as the "Father of Modern Warfare" for his military innovations and his...

William IV of Great Britain (r. 1830-1837) succeeded his elder brother George IV of Great Britain (r. 1820-1830) to become the fifth Hanoverian monarch. William had a successful naval career, and his reign is best remembered for the democratic...

Johann Tetzel (l.c. 1465-1519) was a Dominican Friar who became famous as one of the most effective indulgence salesmen and who inadvertently inspired the Protestant Reformation when Martin Luther (l. 1483-1546) wrote his 95 Theses protesting...

The Duchy of Athens was a Latin or Frankish state in Greece that existed from 1205 to 1458 CE. It was created in the aftermath of the Fourth Crusade (1202-1204 CE) and would be ruled for the majority of its history by the Burgundian de la...