History › Early modern › Protestant Reformation
Martin Luther
1483–1546; 95 Theses October 31, 1517· Person· Europe
Well documentedSolid records, physical evidence or scientific consensus.
A German monk and professor whose 1517 attack on the sale of indulgences launched the Protestant Reformation.
See it on the History map →What happened
An Augustinian friar teaching theology at Wittenberg, Luther concluded that people are saved by God's grace through faith alone, not by good works or purchases. In 1517 he wrote 95 Theses against indulgences, payments sold to reduce punishment for sins. Excommunicated, he refused to recant at the Diet of Worms in 1521. Hidden at Wartburg Castle by his prince, he translated the New Testament into German. In 1525 he married a former nun, Katharina von Bora.
Why it matters
He broke the unity of Western Christianity, his Bible helped standardize written German, and his followers became the Lutheran churches, today about 75 million members.
Legacy and how we know
Legacy: Lutheran churches and modern German. He left over 100 volumes of writings, letters and recorded table talk; his late tracts attacking Jews were later exploited by the Nazis.
Still debated
Whether he actually nailed the Theses to a church door, and whether he said 'Here I stand, I can do no other' at Worms, are uncertain.
Connections (2)
▸Gutenberg's printing press made a mass-media star of Martin LutherWell documented
The connection
Luther wrote short, punchy pamphlets in German that printers could produce and sell quickly; his works of 1518–1525 sold in the hundreds of thousands. Lucas Cranach's Wittenberg workshop circulated his portrait widely, making his face known across Europe. He is often called the first best-selling author, and printers competed to publish him.
When and how
Wittenberg, Germany, 1517–1546; Luther, painter and publisher Lucas Cranach the Elder, and printers such as Johann Rhau-Grunenberg and Hans Lufft.
How we know
Surviving editions of his works, printers' records and Cranach's many portrait copies; historian Andrew Pettegree's 'Brand Luther' (2015) traces this in detail.
Debates and open questions
Whether Luther shaped print culture or simply rode it is debated; sales figures are estimates based on surviving copies.
▸Martin Luther launched Protestant ReformationWell documented
The connection
Luther's 1517 protest against indulgences grew into a full break with Rome. His 1520 pamphlets attacked papal authority and most sacraments; at Worms in 1521 he refused to recant. Protected by Elector Frederick of Saxony, he built a new church with services in German, married clergy and a German Bible, giving others a model to follow.
When and how
Wittenberg, Saxony, 1517–1530; Luther, Elector Frederick the Wise, Philip Melanchthon, and Emperor Charles V at the Diet of Worms.
How we know
Luther's writings, the 1521 papal bull excommunicating him, the Edict of Worms, and the 1530 Augsburg Confession drafted by Melanchthon.
Debates and open questions
Historians debate whether a reformation would have come anyway, given earlier critics like Wycliffe and Hus, and how much depended on Luther himself.