What kind of ship is old ironsides?

"Old Ironsides" is the nickname for the USS Constitution, a wooden-hulled, three-masted frigate of the United States Navy. Launched in 1797, it is renowned for its strong construction and impressive performance during the War of 1812, where it earned its nickname due to its resilience in battle. The ship is the oldest commissioned warship afloat in the world and serves as a symbol of American naval history. Today, it is preserved as a museum ship in Boston, Massachusetts.