The Legend of the Charter Oak
Following the death of England's King Charles II, his brother King James II attempted to revoke the Royal Charters granted to the New England and New York Colonies. The goal was to establish a single Dominion of New England overseen by a royal official rather than allowing each colony a degree of self governance bestowed in the Charters.
According to legend, when the Royal Governor of the Dominion met with Connecticut's leadership in Hartford, the colonists refused to give up the charter. In the confusion of the debate, and the darkness that settled as candled dimmed, the charter apparently disappeared from the meeting. It was stowed in a White Oak tree where it remained until 1689 when King James II gave up the throne to his daughter Mary Stuart and son-in-law William of Orange during the Glorious Revolution, the Charter was retrieved from the Oak and was restored as the colony, and later state, governing document until the Constitution of 1818 was ratified.
Though it is unclear if the mythology of the charter's hiding is based in fact, the story has solidified itself in state lore with the "Charter Oak" as the official state tree and many locations, businesses, and schools bearing its name.