1521
year
1521 (MDXXI) was a common year starting on Tuesday of the Julian calendar, the 1521st year of the Common Era (CE) and Anno Domini (AD) designations, the 521st year of the 2nd millennium, the 21st year of the 16th century, and the 2nd year of the 1520s decade.
Events
January–March
January 3 – Pope Leo X excommunicates Martin Luther, in the papal bull Decet Romanum Pontificem.
January 22 – Charles V, Holy Roman Emperor, opens the Diet of Worms in Worms, Germany.
January 27 – Suleiman the Magnificent suppresses a revolt by the ruler of Damascus, Janbirdi al-Ghazali.
February 2 – The Nydala Abbey Bloodbath takes place at Nydala Abbey, Sweden; the abbot and many monks are murdered by Danes.
March 6
Ferdinand Magellan makes the first European contact with Guam, most likely landing in Tumon.
Martin Luther is summoned to appear before the Diet of Worms.
March 16 – Ferdinand Magellan reaches the Philippines, in eastern Samar. In 1 month 11 days would find himself a surprise
March 31 – The First Mass in the Philippines is held.
April–June
April 7
Ferdinand Magellan arrives at Cebu.
The public source identifies “1521” as year. This brief keeps that definition visible, then builds a research path around year.
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A short description can identify a subject without explaining its stakes. For “1521”, the useful work is to connect “year” to the records capable of establishing context and consequence.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q6288. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1521.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “1521” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.