What is "haemimontus"

Haemimontus was a late Roman and early Byzantine province, situated in northeastern Thrace. It was subordinate to the Diocese of Thrace and to the praetorian prefecture of the East. Its capital was Adrianople, and it was headed by a praeses. The province was superseded by the Theme of Thrace during the 7th century, but survived as an Orthodox ecclesiastical metropolis until late Byzantine times. It remains a titular See of the Roman Catholic Church.