The Balkanic Diocese of Bela had its episcopal see at the town of Bela, presumably now Velitza, in Bosnia and Hercegovina.
Frommid tenth to the eleventh century, the Byzantine empire's Notitiae Episcopatuum mention the see of 'Photice or Bela', as suffragan diocese of the Archdiocese of Naupactus, in the sway of the Patriarchate of Constantinople, thereafter only under the name Bela, testimony that this episcopal see was transferred there from ruined Photice (near Tsiucas) in Greek Epirus. Its only recorded bishop, Constantinus, is merely known from a tenth century episcopal seal . As the Bulgarian empire annexed Epirus, Bela was transferred to the West Bulgarian province of the (later?) medieval Metropolitan Roman Catholic Archdiocese of Achrida (modern Ochrida, Bulgaria: also a multiple Orthodox see), which became the see of the Bulgarian patriarchate (919-1018) in the late tenth century, but was subjected to Constantinople in 1018, albeit as a 'special' Metropolitanate, allowed by Byzantine emperor Basilius II Bulgaroctonus, from 1018 to 1020, to keep as suffragans all sees of the former Bulgarian patriarchate, including Bela, with Ochrid only therafter becoming a regular ecclesiastical province in the patriarchate of Constantinople and remaining so after the Great Oriental Schism (Catholic-Orthodox break-up) in 1054. Bela again became suffragan of Naupactus in thirteenth century , transferred to the Archdiocese of Ioannina in the fifteenth.
It faded, but in 1933 was nominally restored as a Latin Catholic titular bishopric.
It has had the following incumbents, so far of the fitting Episcopal (lowest) rank :