1800s

• 1801: The Kingdom of Great Britain and the Kingdom of Ireland merge to form the United Kingdom.
• 1803: The United States buys out France's territorial claims in North America via the Louisiana Purchase
• 1810: The University of Berlin, the world's first research university, is founded. Among its students and faculty are Hegel, Marx, and Bismarck.
• 1816: Year Without a Summer
• 1819: The modern city of Singapore is established by the British East India Company.
• Panic of 1819
  
• 1836: Ramakrishna Paramahansa is Born
• 1837: Panic of 1837
  
• 1850: The Little Ice Age ends around this time.
• 1863: Formation of the International Red Cross
• 1865-77: Reconstruction in the United States
• 1867: The United States purchased Alaska from Russia.
• 1869: First Transcontinental Railroad completed in United States.
• 1896: Black Friday
  
• 1871-1914: Second Industrial Revolution
• 1872: Yellowstone National Park is created.
• 1873: Long Depression
  
• 1874: The British East India Company is dissolved.
• 1875-1900: 26 million Indians perished in India due to famine.
• 1878: First commercial telephone exchange in New Haven, Connecticut.
• 1881: First electrical power plant and grid in Godalming, Britain.
• Telephone
• Railways
• Department stores
• Epidemiology
• Postage stamps
• Public buses
• Subway
• Steam power