The United States exhibited the country’s first-ever lion in Boston.
Source
The New York and Harlem Railroad became the first railroad to operate in the US.
The Congress of Vienna declared Kraków, Poland, a free republic state, and the Constitution of the Kingdom of Poland was signed.
The Chicago Times-Herald sponsored the United States' first-ever car race, with the winning car going an average of 7 miles per hour.
The UK-based computer company Raspberry Pi released their $5 (£4) computer.
The 400th anniversary of the end of the Transatlantic Slave Trade was celebrated with the 'Year of Return' in Ghana.
