1811 (MDCCCXI) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1811th year of the Common Era (CE) and Anno Domini (AD) designations, the 811th year of the 2nd millennium, the 11th year of the 19th century, and the 2nd year of the 1810s decade. As of the start of 1811, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

Millennium: 2nd millennium
1811 in various calendars
Gregorian calendar1811
Ab urbe condita2564
Armenian calendar1260
Assyrian calendar6561
Balinese saka calendar1732–1733
Bengali calendar1218
Berber calendar2761
British Regnal year51 Geo. 3 – 52 Geo. 3
Buddhist calendar2355
Burmese calendar1173
Byzantine calendar7319–7320
Chinese calendar庚午(Metal Horse)
4507 or 4447
    — to —
辛未年 (Metal Goat)
4508 or 4448
Coptic calendar1527–1528
Discordian calendar2977
Ethiopian calendar1803–1804
Hebrew calendar5571–5572
Hindu calendars
 - Vikram Samvat1867–1868
 - Shaka Samvat1732–1733
 - Kali Yuga4911–4912
Holocene calendar11811
Igbo calendar811–812
Iranian calendar1189–1190
Islamic calendar1225–1226
Japanese calendarBunka 8
Javanese calendar1737–1738
Julian calendarGregorian minus 12 days
Korean calendar4144
Minguo calendar101 before ROC
Nanakshahi calendar343
Thai solar calendar2353–2354
Tibetan calendar阳金马年
(male Iron-Horse)
1937 or 1556 or 784
    — to —
(female Iron-Goat)
1938 or 1557 or 785






Date unknown




Date unknown



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1810 and 1811 United States House of Representatives elections

Elections to the United States House of Representatives for the 12th Congress were held in the various states between April 1810 (in New York) and August 1811 (in Tennessee) during James Madison's first term in office. Louisiana elected its first representative in September 1812. Congress assembled on November 4, 1811. The first session witnessed the unprecedented occurrence of a new member, Henry Clay, being elected Speaker of the House. This has happened only once since, in 1860 when William Pennington was elected to the post.With the repeal of the Embargo Act of 1807, the Democratic-Republicans enjoyed a renewed popularity. As the economy improved following the reopening of the export market, many of the seats that had entered Federalist hands over economic concerns reverted to the Democratic-Republicans, who were able to re-claim the two-thirds majority they had lost in the previous election.

1810 and 1811 United States Senate elections

The United States Senate elections of 1810 and 1811 were elections that had the Democratic-Republican Party maintain their majority the United States Senate. The minority Federalists had gone into the elections with such a small share of Senate seats (8 out of 34, or 23.5%) that they had won all of the elections, they would still not have controlled a majority.

As these elections were prior to ratification of the seventeenth amendment, Senators were chosen by state legislatures.

1811 English cricket season

1811 was the 25th season of cricket in England since the foundation of Marylebone Cricket Club (MCC). Lord's Middle Ground came into use for important matches.

1811 New York lieutenant gubernatorial special election

The 1811 Lieutenant Gubernatorial Special Election in New York was held to fill the unexpired term of the Lieutenant Governor of New York.

1811 in Denmark

Events from the year 1811 in Denmark.

1811 in France

Events from the year 1811 in France.

1811 in Ireland

Events from the year 1811 in Ireland.

1811 in Sweden

Events from the year 1811 in Sweden

1811–12 New Madrid earthquakes

The 1811–12 New Madrid earthquakes were an intense intraplate earthquake series beginning with an initial earthquake of moment magnitude 7.5–7.9 on December 16, 1811, followed by a moment magnitude 7.4 aftershock on the same day. They remain the most powerful earthquakes to hit the contiguous United States east of the Rocky Mountains in recorded history. They, as well as the seismic zone of their occurrence, were named for the Mississippi River town of New Madrid, then part of the Louisiana Territory, now within the US state of Missouri.

There are estimates that these stable continental region earthquakes were felt strongly over roughly 130,000 square kilometers (50,000 sq mi), and moderately across nearly 3 million square kilometers (1 million square miles). The 1906 San Francisco earthquake, by comparison, was felt moderately over roughly 16,000 km2 (6,200 sq mi).

The New Madrid earthquakes were interpreted variously by American Indian tribes, but one consensus was universally accepted: the powerful earthquake had to have meant something. For many tribes in Tecumseh's pan-Indian alliance, it meant that Tecumseh and his brother the Prophet must be supported.

Battle of Barrosa

The Battle of Barrosa (Chiclana, 5 March 1811, also known as the Battle of Chiclana or Battle of Cerro del Puerco) was part of an unsuccessful manoeuvre to break the siege of Cádiz in Spain during the Peninsular War. During the battle, a single British division defeated two French divisions and captured a regimental eagle.

Cádiz had been invested by the French in early 1810, leaving it accessible from the sea, but in March of the following year a reduction in the besieging army gave its garrison of British and Spanish troops an opportunity to lift the siege. A large Allied strike force was shipped south from Cádiz to Tarifa, and moved to engage the siege lines from the rear. The French, under the command of Marshal Victor, were aware of the Allied movement and redeployed to prepare a trap. Victor placed one division on the road to Cádiz, blocking the Allied line of march, while his two remaining divisions fell on the single Anglo-Portuguese rearguard division under the command of Sir Thomas Graham.

Following a fierce battle on two fronts, the British succeeded in routing the attacking French forces. A lack of support from the larger Spanish contingent prevented an absolute victory, and the French were able to regroup and reoccupy their siege lines. Graham's tactical victory proved to have little strategic effect on the continuing war, to the extent that Victor was able to claim the battle as a French victory since the siege remained in force until finally being lifted on 24 August 1812.

Franklin County, Massachusetts

Franklin County is a nongovernmental county located in the U.S. state of Massachusetts. As of the 2010 census, the population was 71,372, which makes it the least-populous county on the Massachusetts mainland, and the third-least populous county in the state. Its traditional county seat and most populous city is Greenfield. Its largest town by area is New Salem.Franklin County comprises the Greenfield Town, MA Micropolitan Statistical Area, which is included in the Springfield-Greenfield Town, MA Combined Statistical Area.

Great Comet of 1811

The Great Comet of 1811, formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, a record it held until the appearance of Comet Hale–Bopp in 1997. In October 1811, at its brightest, it displayed an apparent magnitude of 0, with an easily visible coma.

Invasion of Java (1811)

The invasion of Java in 1811 was a successful British amphibious operation against the Dutch East Indian island of Java that took place between August and September 1811 during the Napoleonic Wars. Originally established as a colony of the Dutch Republic, Java remained in Dutch hands throughout the French Revolutionary and Napoleonic Wars, during which time the French invaded the Republic and established the Batavian Republic in 1795, and the Kingdom of Holland in 1806. The Kingdom of Holland was annexed to the First French Empire in 1810, and Java became a titular French colony, though it continued to be administered and defended primarily by Dutch personnel.

After the fall of French colonies in the West Indies in 1809 and 1810, and a successful campaign against French possessions in Mauritius in 1810 and 1811, attention turned to the Dutch East Indies. An expedition was dispatched from India in April 1811, while a small squadron of frigates was ordered to patrol off the island, raiding shipping and launching amphibious assaults against targets of opportunity. Troops were landed on 4 August, and by 8 August the undefended city of Batavia capitulated. The defenders withdrew to a previously prepared fortified position, Fort Cornelis, which the British besieged, capturing it early in the morning of 26 August. The remaining defenders, a mixture of Dutch and French regulars and native militiamen, withdrew, pursued by the British. A series of amphibious and land assaults captured most of the remaining strongholds, and the city of Salatiga surrendered on 16 September, followed by the official capitulation of the island to the British on 18 September. The island remained in British hands for the remainder of the Napoleonic Wars, and was restored to the Dutch in the Convention of London in 1814.

List of Acts of the Parliament of the United Kingdom, 1801–1819

This is an incomplete list of Acts of the Parliament of the United Kingdom for the years 1801–1819. Note that the first parliament of the United Kingdom was held in 1801; parliaments between 1707 and 1800 were either parliaments of Great Britain or of Ireland). For Acts passed up until 1707 see List of Acts of the Parliament of England and List of Acts of the Parliament of Scotland. For Acts passed from 1707 to 1800 see List of Acts of the Parliament of Great Britain. See also the List of Acts of the Parliament of Ireland.

For Acts of the devolved parliaments and assemblies in the United Kingdom, see the List of Acts of the Scottish Parliament from 1999, the List of Acts of the Northern Ireland Assembly, and the List of Acts and Measures of the National Assembly for Wales; see also the List of Acts of the Parliament of Northern Ireland.

The number shown after each Act's title is its chapter number. Acts passed before 1963 are cited using this number, preceded by the year(s) of the reign during which the relevant parliamentary session was held; thus the Union with Ireland Act 1800 is cited as "39 & 40 Geo. 3 c. 67", meaning the 67th Act passed during the session that started in the 39th year of the reign of George III and which finished in the 40th year of that reign. Note that the modern convention is to use Arabic numerals in citations (thus "41 Geo. 3" rather than "41 Geo. III"). Note also that Acts of the last session of the Parliament of Great Britain and the first session of the Parliament of the United Kingdom are both cited as "41 Geo. 3". Acts passed from 1963 onwards are simply cited by calendar year and chapter number.

All modern Acts have a short title, e.g. "the Local Government Act 2003". Some earlier Acts also have a short title given to them by later Acts, such as by the Short Titles Act 1896.

Massachusetts General Hospital

Massachusetts General Hospital (Mass General or MGH) is the original and largest teaching hospital of Harvard Medical School and a biomedical research facility located in the West End neighborhood of Boston, Massachusetts. It is the third oldest general hospital in the United States. With Brigham and Women's Hospital, it is one of the two founding members of Partners HealthCare, the largest healthcare provider in Massachusetts. Massachusetts General Hospital conducts the largest hospital-based research program in the world, with an annual research budget of more than $900 million. It is currently ranked as the #4 hospital in the United States by U.S. News & World Report.In November 2017, The Boston Globe ranked MGH 5th place of top workplaces, of Massachusetts companies with over 1,000 employees, this was up from 6th place in 2016.

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