but are especially widespread in Europe and Japan. Day spas are also quite popular, and offer various personal care treatments, the term is derived from the name of the town of Spa, Belgium, whose name is known back to Roman times, when the location was called Aquae Spadanae, sometimes incorrectly connected to the Latin word “spargere” meaning to scatter, sprinkle or moisten. Since medieval times, illnesses caused by iron deficiency were treated by drinking chalybeate (iron-bearing) spring water (in 1326, the ironmaster Collin le Loup claimed a cure, when the spring was called Espa, a Walloon word for "fountain").