The mineral springs are indispensable life-giving centre in the history of Sofia, already from the VI-V century BC, when Thracians established a sanctuary (nympheum) and prehistoric settlement around the hot mineral spring where the city centre is located today.

Around the I century AD, the spring was captured by the Romans, and thermal baths (Roman baths) and a temple dedicated to the gods of medicine Asclepius, Apollo and Hygeia were built around it.

At the beginning of the XX century, a new municipal bath was built, replacing the old baths, with a large, beautiful and functional building equipped with all modern facilities and water treatment installations.

The surrounding area was improved with the construction of a fountain and a square.

Today, over 40 springs spring on the territory of the Sofia mineral water basin with diverse composition and healing properties. They are one of the symbols of the capital and are included in its coat of arms.