It is a well-known spa town and was first mentioned in written documents dating back to 1436.

After 1833, when a new source of mineral water was discovered, it developed into a popular resort.

[3] In 1833 Karol F. Henn, at the time still a student of medicine, discovered the mineral water there.

He took some samples of the water for analysis and returned to Radenci after 32 years, in 1869, at that time already a renowned doctor and expert in balneology.

[6] The same year he bottled the first "Radenska Three Hearts" mineral water, which was later supplied to the emperor's court in Vienna and to the pope's palace in Rome.