Why is the USS Constitution famously nicknamed "Old Ironsides"?

The nickname "Old Ironsides" for the USS Constitution originates from the ship's reputation for having remarkably durable and resilient hull construction made from oak and other materials. During the War of 1812, there were accounts of cannonballs bouncing off its sides, leading to the impression that the ship was nearly invulnerable. This reputation contributed significantly to its legacy and the enduring imagery of the ship as a symbol of strength and resilience in naval warfare. The nickname stuck and has since become a significant part of American naval history, honoring the ship’s extraordinary performance and durability in battle, which is central to why it gained the nickname.