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The bubonic plauge was the last major bubonic plauge epidemic to ravage through Europe. It occured throughout 1665-1666.  n 1666 the Great Fire of London destroyed much of the centre of London, but also helped to kill off a good portion of the infected rats and fleas that carried the plague. The plauge had killed an estimated 100,000 people, which was roughly 1/4 of the population of London at the time. The disease was thought to have traveled through fleas which were, unfortunatly, very common in this time era and difficult to get rid of.
It was later known as the Great Plauge as it was the last upspring of the Bubonic Plauge.

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European politics, philosophy, science and communications were radically changed during the course of the Enlightment era (1685-1815). Enlightenment thinkers were majorly based in and around Britain, France and throughout Europe. They questioned traditional authority and embraced the notion that humanity and life itself could ultimitley be improved through progressive change. IMportant philosphers who kicked off the revolution were namley Francis Bacon, Thomas Hobbes,Renee Descartes and many others played a key role in the natural philosophy of the Scientific Revolution.
http://www.history.com/topics/enlightenment

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"The first true piano was invented almost entirely by one man—Bartolomeo Cristofori (1655–1731)"  He was the keeper of instruments for the Florentine court of Grand Prince Ferdinando de’ Medici and he ended up inventing the 'pianoforte', which was an instrument which had hard and soft notes (hence 'forte'). His goal was to creat something that “[gave] an instrument the speech of the heart, now with the delicate touch of an angel, now with violent eruptions of passions," Three pianos created by Cristofori sit at three seperate mueseums today.
http://museostrumentimusicali.beniculturali.it/index.php?en/141/the-cristofori-piano
https://www.metmuseum.org/toah/hd/cris/hd_cris.htm

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The great Turkish war was a war which occured between the Ottomans and 'The Holy League'. It was the start of the Ottomans retreating from their land in Europe, although it lasted over ten years (1667-). The war lasted well into the 1700's while still trying to settle whos land was whos. This war was also part of the Spanish Succession, which started in 1701 and lasted until 1714.
http://www.newworldencyclopedia.org/entry/Great_Turkish_War
https://www.youtube.com/watch?v=VHhJj9o292k

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Declaration of the Rights of Man and of the Citizen

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Declaration of the Rights of Man and of the Citizen

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The Declaration of the Rights of Man and of the Citizen was signed and  approved by the national assembly of France on August 26, 1789. The people of Franc organized as a National Assembly with the beliefe that the ignorance, neglect, or contempt of the rights of man were the causes of public calamities and of the corruption of governments. Although shortly after this was signed, Napolean took power and this decleration was never really enforced.
http://avalon.law.yale.edu/18th_century/rightsof.asp
https://www.britannica.com/topic/Declaration-of-the-Rights-of-Man-and-of-the-Citizen

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Declaration of the Rights of Man and of the Citizen

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Pounds, shillings and pence were the basic currency of Britain in our time period. The coins were roughly valued at 12 pence to the shilling and 20 shillings to the pound. There were other coins valued at halfpence and qauarterpence (farthings) aswell. Since there weren no machines to make each coin exact, many people had a sclae they would use to weigh the coin in order to ensure its worth. There was several seperat decades where coinage was so short that people would attempt to make their own coins and in the process of doing that they would get themselves in trouble with the courts. In 1696 Britian had a 'recoinage' which had the gpvernments issue more coins in attempt to stop the coin shortage.
https://www.oldbaileyonline.org/static/Coinage.jsp

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The inventor of the steam boat was John itch of Philadelphia and was first attempted on August 22, 1787. He managed to get his boat accross a small part the Delaware River - a whopping 45 feet. Later he had a larger vessel built that carried passengers and freight between Philadelphia and Burlington, New Jersey.
Originally, he had several boats built with different ideas of how to most efficiently use the steam engine, he had incorporated propulsive force, including ranked paddles, paddle wheels and screw propellers.
https://www.thoughtco.com/history-of-steamboats-4057901

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The Congress of the United States, which was established by the new Constitution, met for the first time at New York City’s Federal Hall on March 4, 1789. This new legislature had the responsibility of passing all the legislation needed to implement the new system being brought to America. The first new laws introduced were regarding oaths,  established the Departments of State, War, and Treasury, created a Federal judiciary, set compensation for government officials, provided lighthouses, authorized expenses for negotiating with Indigenous tribes; and implementing duties on imported goods. This was clearly a hard and stressful time for people who worked with the senate. Roughly one third resigned during 1785-1790, which was the time leading up to this event.  Speaker of the House was Frederick A.C. Muhlenberg, the Clerk of the House was John Beckley, and the Sergeant at Arms was Joseph Wheaton. Although I was unable to find who attended other than what I've stated above, it is assumed that George Washington was there as this was during his reign of presidency.
https://www.archives.gov/exhibits/treasures_of_congress/text/page2_text.html

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This system was popular during the 12th century in Europe but hibernated until the late 1600's. Once in use again, the mercantile era drew to a close around 1800, making way for industrial capitalism. "Mercantilism is an economic theory and practise where the government seeks to regulate the economy and trade in order to promote domestic industry – often at the expense of other countries." Mercantilism is when somewhere/someone puts an import tax on something; The United States did that.
https://www.quora.com/What-is-mercantile-capitalism https://www.quora.com/What-are-the-features-of-mercantilism