Louisburg Square is a private square located in Boston, Massachusetts that is maintained by the Louisburg Square Proprietors. While the Proprietors pay taxes to the City of Boston, the city does not own the square or its garden. It was named for the 1745 Battle of Louisbourg, in which Massachusetts militiamen led by William Pepperrell, who was made the first American baronet for his role, sacked the French Fortress of Louisbourg.