Okay, here's a list of significant events in 1857, formatted as a Wikipedia article in Markdown:
1857
1857 (MDCCLVII) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1857th year of the Common Era (CE) and Anno Domini (AD) designations, the 857th year of the 2nd millennium, the 57th year of the 19th century, and the 8th year of the 1850s decade.
Events
Politics and Law
March 4: James Buchanan is inaugurated as the 15th President of the United States. He succeeds Franklin Pierce.
March 6:Dred Scott v. Sandford: The United States Supreme Court, under Chief Justice Roger B. Taney, rules that people of African descent, whether enslaved or free, could not be citizens of the United States and that Congress had no power to prohibit slavery in the territories. This landmark decision further inflamed tensions leading up to the American Civil War.
https://www.wikiwhat.page/kavramlar/dred%20scott%20decision
May 10: The Sepoy Mutiny/Indian Rebellion of 1857 begins in Meerut, India, against the rule of the British East India Company. This event had profound political and social consequences in India and Great Britain.
https://www.wikiwhat.page/kavramlar/indian%20rebellion%201857
August 21: Beginning of the Lincoln–Douglas debates, a series of seven debates between Abraham Lincoln and Stephen Douglas during the 1858 United States Senate election campaign in Illinois. Although the debates were held in 1858, the seeds of these debates were being sown during 1857 as both men began to define their positions on slavery and popular sovereignty.
https://www.wikiwhat.page/kavramlar/lincoln-douglas%20debates
August 24: Panic of 1857: The failure of the Ohio Life Insurance and Trust Company triggers a widespread financial panic in the United States, leading to bank runs, business failures, and economic hardship.
December 29: British and French forces capture Canton (Guangzhou), China, during the Second Opium War.
https://www.wikiwhat.page/kavramlar/second%20opium%20war
Science and Technology
February 11: Sir George Airy presents his determination of the mean density of the Earth, based on pendulum experiments in the Harton Pit coal mine.
October 25: Sheffield F.C., recognised as the world's oldest football club, is founded in Sheffield, England.
https://www.wikiwhat.page/kavramlar/sheffield%20fc
Earliest date for Neanderthal 1 specimen to be considered a Neanderthal fossil. Earlier, the specimen had not been recognized as a separate species from Homo Sapiens.
https://www.wikiwhat.page/kavramlar/neanderthal
Culture
January 28:Madame Bovary by Gustave Flaubert is published in book form after serialization.
https://www.wikiwhat.page/kavramlar/madame%20bovary
September 15: The novel Little Dorrit by Charles Dickens is completed and published in book form.
https://www.wikiwhat.page/kavramlar/little%20dorrit
Other Significant Events
September 11: Mountain Meadows Massacre: Mormon militia attack and kill a wagon train of settlers traveling through Utah Territory. This event remains a highly controversial and tragic episode in United States history.
https://www.wikiwhat.page/kavramlar/mountain%20meadows%20massacre
This list includes events considered broadly important across various categories. Focus has been given to events that had a lasting impact or contributed significantly to historical developments.