What is Maison De Dieu?

Legal Definition
House of God. In England the term, borrowed from the French, signified formerly a hospital, an almshouse, a monastery. 39 Eliz. c. 5.
-- Bouviers Law Dictionary
Legal Definition
Fr. A hospital; an almshouse; a monastery. St. 39 Eliz. c, 6. Literally, "house of God."
-- Black's Law Dictionary
Legal Definition
House of God, a hospital.
-- Ballentine's Law Dictionary