Legends are connected with miracles; nevertheless Hévíz is a miracle in itself.
According to an ancient legend on the origin and healing effect of the lake, the Holy Virgin wrung a spring by the appealing prayer of a Christian nurse. The nurse wanted to heal an invalid child. The hot water of the lake breaking out from the depth and the steaming mud completely cured the weak child.
The legend stems from the Roman age and the mentioned child was definitely the East Roman emperor, Flavius Theodosius, who declared Christianity the official religion in his own empire in 391. The spring has been feeding the world-wide unique Lake of Hévíz ever since.