Blou is one of the oldest inhabited villages of Anjou. Its elevated position, surrounded by a rich country on the edge of a valley flooded regularly, had to make a natural refuge from the earliest ages. At the point called "The Grippeau" is Roman amphorae found in abundance.
The town is dominated by a ridge of 109 meters, the highest point of the region, where one can admire a magnificent panorama, and in good weather, the arrows of the cathedral of Angers.
Its Romanesque church dedicated to Our Lady, is a historical monument.
"The Citadel", "The Tower of the Rooster," "The Temple", "The Cathedral" are names of farms that remind of the Middle Ages. Blou was then one of the four baronies of Anjou.
The town is part of Blou NRP (Anjou-Touraine Regional Natural Park).