Historical events on the 18th of September
- 5 References
- 887 – Venetian Doge Pietro I Candiano dies in battle against the Narentines.
- 1679 – The Province of New Hampshire is separated from the Massachusetts Bay Colony.
- 1837 – Tiffany & Co. (first named Tiffany & Young) is founded by Charles Lewis Tiffany and Teddy Young in New York City. The store is called a "stationery and fancy goods emporium".