Middle Ages

In 1134, on the initiative of Raymond Séradis and d'Alphonse Jourdain, Count of Toulouse, Montech became a fortified site, a Castrum, whose function was to better protect the North of Toulouse. Ten years before Montauban a count's castle was built nearby, around which a new town developed. To the south-east, the castle is integrated with a system of fortifications which are surrounded by deep ditches. The plan adopted for this new town corresponds to a bastide-type plan (the bastides were built in the 13th century) with streets crossing at right angles, a central square, fortified gates with a drawbridge at the cardinal points which became the only access routes.

Towers flanked these gates and three of the wings of the enclosure. The La porte du Terrier (to the north) is the main gate. The city became royal in 1271, at the time of Philip III the Bold who granted it a charter of which several old copies, in Latin, exist. Originally, the parish church of Saint Etienne and its cemetery were located to the northeast of the town, a few hundred meters away. A chapel was probably built near the count's castle, but it was in the 14th century that a new church dedicated to Notre Dame de la Visitation was built. The bottom of the nave and the choir encroach on the lower courtyard of the castle.

The French Wars of Religion made Montech a bastion of Catholicism against Protestant Montauban.