The top of Castle Street in Waterford is dominated by the French Tower. The origin of the name is uncertain.

Many of the Anglo-Norman settlers who came to Waterford in the wake of the invasion were of French origin and the tower may owe its name to these settlers.

It may also be connected with the Huguenot, French protestant refugees who settled in Waterford after the victory of William of Orange at the Battle of the Boyne in 1690. The French settlers mixed well with the local population and contributed much to the city's development.

The 'Blaa' (a popular and traditional breakfast-time bread found only in Waterford) is said to owe its origins to the 17th century immigrants who introduced this type of bread into the city.

The French called it pain blanc which was corrupted by the locals into 'blaa'.