Louis of Brienne

Louis of Brienne, also known as Louis of Acre (died in 1297), was viscount of Beaumont-sur-Sarthe in Maine, France. Early life Louis was the second son of John of Brienne and his third wife, Berengaria of León. Louis and his two brothers, Alfonso and John, were commonly labelled as "of Acre" for the capital of the Kingdom of Jerusalem, although they were born years after their father had ruled the kingdom. The barons of the Latin Empire of Constantinople offered to elect John of Brienne co-ruler of their minor emperor, Baldwin II, in 1229. John accepted the offer and the terms of his election were included in a treaty in Perugia in April 1229. The treaty stipulated that John's three sons were entitled to rule Epirus and Macedonia if he could occupy the two regions from the Greek ruler, Theodore Komnenos Doukas. John and his family moved to Constantinople where Baldwin II married John's daughter, Marie, and John was crowned co-emperor in July 1231.