 It assumed its current form in 1850 and is named for Mobile's founder, Jean-Baptiste Le Moyne, Sieur de Bienville.It was once the principal gathering place for residents, when the city was smaller, and remains popular today.Cathedral Square is a one-block performing arts park, also in the Lower Dauphin Street Historic District, which is overlooked by the Cathedral Basilica of the Immaculate Conception.