Water Entrance Tower, Historic site in Montferrand, Clermont-Ferrand, France

The Tour d'entrée de l'eau is a historic structure in the Montferrand district of Clermont-Ferrand, built to control how water entered the old town. It is made from local lava stone and formed part of the former defensive walls that once enclosed Montferrand.

Montferrand was founded around 1120 and built from the start with defensive walls and water management structures, of which this tower was one. After the town merged with Clermont in 1731, the old fortifications lost their purpose, but the structure survived and is now listed as a protected monument.

The name "Tour d'entrée de l'eau" translates literally as "water entry tower," which tells you exactly what the structure once did. It stands in one of the oldest corners of Clermont-Ferrand, where the dark lava stone walls give the street a look that has changed little over the centuries.

The structure sits in the Montferrand historic district, which is easy to walk through on foot. It is best seen as part of a stroll through the old streets of the neighborhood, where heritage information signs are posted nearby.

Although the tower looks like a purely defensive structure, its main role was actually water management, a sign of how closely water supply and city fortification were linked in medieval town planning. The water it once channeled came from the Tiretaine river, which still flows beneath the streets of Clermont-Ferrand today, unnoticed by most people walking above it.