1566
year
Year 1566 (MDLXVI) was a common year starting on Tuesday of the Julian calendar.
Events
January–March
January 7 – Cardinal Michele Ghislieri is elected as the new Pope by two-thirds of the College of Cardinals, to succeed Pope Pius IV, who had died 28 days earlier on December 8. Ghislieri becomes the 225th pope, and takes the regnal name Pope Pius V.
February 24 – In one of the first gun assassinations in Japanese (if not world) history, Mimura Iechika, the daimyō (warlord) of the Bitchū Province, is shot dead by two brothers (Endo Matajiro and Yoshijiro), sent by his rival Ukita Naoie.
March 28 – The foundation stone of Valletta, which will become Malta's capital city, is laid by Jean Parisot de Valette, Grand Master of the Sovereign Military Order of Malta.
March – The Hanseatic city of Lübeck launches the galleon Adler von Lübeck, probably the largest ship in the world at this time.
April–June
April 5 – The Compromise of Nobles is presented to Margaret of Parma, Governor of the Habsburg Netherlands, but it succeeds only in delaying the beginning of the Eighty Years' War in the Netherlands.
May 1
Charles IX, King of France, completes his grand tour of his kingdom, returning to Paris a little more than 27 months and 2,500 miles (4,000 km) after his departure on January 24, 1564.
Suleiman the Magnificent, the Sultan of the Ottoman Empire, begins his last campaign, departing from Constantinople at the head of one of the largest armies he has ever commanded, with a plan to attack Vienna, capital of the Holy Roman Empire. However, he dies in September.
May 13 – Maximilian II, Holy Roman Emperor imposes a Reichsexekution upon John Frederick II, Duke of Saxony.
This brief starts where responsible research should: with the source description of “1566” as year. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as year. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 8, 2026. The linked authority identifier is Q6638. The first chronological checks are 1566 and 1564.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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 “1566” 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.