In the 13th century, the castle was enlarged and equipped with robust towers and curtain walls. The castle integrated into the triangular outcrop of rock on which it was built a structure in the style of the castles of Philip II August. Late in the century, in 1295, the town passed to Guy IX de Laval, on his marriage with the heiress, and afterwards successively belonged to the families of Rieux, Coligny and La Trémoille. During this period, the "Vieil Bourg" including the church of Nôtre-Dame, developed on the eastern side of Vitré. The city was encircled by fortified ramparts and ditches. It was at this time that the "walled city" took its current form. The Baron directed the construction of the "privileged boroughs" around the walled city. These boroughs defined the linear layout of the streets of Vitré's present neighborhoods. Since the 13th century, Vitré has joined together all of the elements of the traditional medieval city: a fortified castle, religious buildings, churches, colleges, and suburbs.