St. Charles Avenue (French: avenue Saint-Charles) is a thoroughfare in New Orleans, Louisiana, U.S. and the route of the St. Charles Streetcar Line. It is also famous for the dozens of mansions that adorn the tree-lined boulevard for much of the uptown section of the boulevard. It is named for St. Charles Borromeo, patron saint of Charles III of Spain, the monarch when France transferred the then-vast territory of Louisiana to Spain at the conclusion of the Seven Years' War in 1763. The Southern live oak trees, plentiful in the historic Garden District, were planted during the early twentieth century. Similar additions were made on other major New Orleans streets, such as Carrollton Avenue, Napoleon Avenue, and part of Canal Street, becoming one of the city's most memorable features. St. Charles Avenue is one of the chief Mardi Gras parade routes. From Wikipedia
