- Fort Ontario was originally built by the English under Governor Shirley in 1755
- In 1756 it was captured and destroyed by the French under Marquis of Montcalm
- Rebuilt by the English Lord Amherst in 1759
- Destroyed by the Americans in 1778
- Rebuilt by the English in 1782
- Surrendered by the English and garrisoned by the United States in 1796
- destroyed and Captured by the English under Admiral Yeo in 1814
- Rebuilt with earth and timber by the United States 1839 to 1842
- Rebuilt of stone and concrete by the United States in 1863 to 1870
- The Fort was enlarged and built of brick by the United States in 1903 to 1905
A look inside Fort Ontario
https://www.youtube.com/watch?v=yHm96f3Am_s#t=40
