[2] This, or possibly Germen, was the birthplace of the great Byzantine general Belisarius and was mentioned in the 6th century as Γερμανία, Γερμανός, Γέρμεννε.

In an 11th-century charter of Byzantine Emperor Basil II (Porphyrogenitus/ the Young), it was listed as Γερμάνεια (Germaneia).

It is vacant since decades, having had only the following incumbents, so far of the fitting Episcopal (lowest) rank : Sapareva Banya is also the seat of Sapareva Banya municipality (part of Kyustendil Province), which includes the following 3 villages: According to the latest Bulgarian census of 2011, the religious composition, among those who answered the optional question on religious identification, was the following: The 12th-13th-century St Nicholas Church, the 18th-century St George's Church from the Bulgarian National Revival and the Forty Martyrs Church from 1859 are located in Sapareva Banya.

Mineral water of Separeva banya was highly regarded and used as a cure by Thracians and Romans.

Saparevian mineral water is clear, colorless, with smell of hydrogen sulfide, hyperthermal (temperature 103 °C), hydrocarbonate, sulphate-sodium, fluorine, silicon and sulphide.