Mollet del Vallès celebrated its one-thousandth anniversary in 1993. The earliest document bearing its name dates to 993 AD. At that time, Gallecs and Mollet were small villages surrounded by fields and forests.

From that period, we find the 12th-century Romanesque Santa Maria de Gallecs Church, the base of the bell tower from the Sant Vicenç Church (11-12th centuries) and several farmhouses. In the late 15th century, the new Gothic-style Sant Vicenç Church was built atop the modest Romanesque structure.

Mollet became an important stop on the land routes between Barcelona and Vic and Barcelona and Girona-France. But it was not until the end of the 18th century that Mollet’s population experienced significant growth.