
During the Hundred Years’ War, the Treaty of Brétigny offered Montauban to the English. The construction of a fort on the banks of the Tarn then began, the left bank having remained French.
In 1664, Bishop Pierre de Bertier decided to establish his new bishop’s palace on the ruins of the old fort. It became the city hall after the Revolution, and is also home to the first municipal museum as well as the drawing school.

