What is 1800s?
{{decadebox|180}} The '''1800s''' was the decade that began on January 1, 1800 and ended on December 31, 1809. It is distinct from the decade known as the <nowiki>'''181st decade'''</nowiki> which began on January 1, 1801. and ended on December 31, 1810. == Events == *Beginning of the [[Napoleonic Wars]] ([[1803]]–[[1815]]). *[[Semaphore]] is adopted by [[navy|navies]]. *The [[United Kingdom]] was founded ([[1801]]) == World leaders == * Emperor [[Napoleon I of France|Napoleon I]] ([[First French Empire]]) * Emperor [[Francis II, Holy Roman Emperor|Francis II]] ([[Holy Roman Empire]]) * [[Frederick William III of Prussia]] ([[Prussia]]) * [[Pope Pius VII]] * [[Tsar]] [[Paul I of Russia|Paul I]] ([[Russia]]) * Tsar [[Alexander I of Russia|Alexander I]] (Russia) * King [[Charles IV of Spain|Charles IV]] ([[Spain]]) * King [[George III of the United Kingdom|George III]], ([[United Kingdom]]) * [[President of the United States|President]] [[John Adams]] ([[United States]]) * President [[Thomas Jefferson]] (United States) * [[Fath Ali Shah]] of [[Qajar dynasty]] ([[Persia]]) * [[Jiaqing Emperor]] of [[China]] ([[Qing Dynasty]]) == Births == {{none}} == Deaths == {{none}} [[Category:1800s| ]]