The history of Welzheim reaches back to the time of the Roman Empire. Around the year 160 AD the Romans founded a colony and two forts there; linguists reconstructed their Latin name as (Castra) Valentia on the base of the town's medieval name Wallenzin first mentioned in 1181. In 1980, for the 800th anniversary of the founding of the city, the eastern part (Ostkastell) of the ruins was reconstructed, and in 1993 an archeological park was founded on the site. It contains replicas of Roman stone monuments and explanatory plaques about Roman Welzheim. The western part of the fort was built over through the years.
The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.