1720
year
1720 (MDCCXX) was a leap year starting on Monday of the Gregorian calendar and a leap year starting on Friday of the Julian calendar, the 1720th year of the Common Era (CE) and Anno Domini (AD) designations, the 720th year of the 2nd millennium, the 20th year of the 18th century, and the 1st year of the 1720s decade. As of the start of 1720, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.
Events
January–March
January 21 – Treaties of Stockholm (Great Northern War): Sweden and Prussia sign a treaty by which part of Swedish Pomerania, including the town of Stettin, is ceded to Prussia.
February 10 – Edmond Halley is appointed as Astronomer Royal for England.
February 17 – The Treaty of The Hague is signed between Spain, Britain, France, Austria and the Dutch Republic, ending the War of the Quadruple Alliance with effect from May 20.
February 24 – Battle of Nassau: Spanish forces assault the British settlement of Nassau, Bahamas at the end of the War of the Quadruple Alliance.
March 11 (February 29 Old Style) – Queen Ulrika Eleonora of Sweden resigns, to let her husband Frederick I take over as king of Sweden. She had desired a joint rule, in a similar manner to William III and Mary II in Britain, but as the Riksdag of the Estates (Sweden's parliament) refuses this, she abdicates in her husband's favour instead.
April–June
April 4 – The Riksdag of the Estates elects Frederick I new King of Sweden.
April 17 – Bajirao I is appointed as the Peshwa of the Maratha Empire by Chhatrapati Shahu, succeeding his father Peshwa.
This brief starts where responsible research should: with the source description of “1720” as year. Everything that follows is an evidence route, not borrowed authority.
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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.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 15, 2026. The linked authority identifier is Q6908. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1720 and 1923.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. 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 “1720” 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.