Medjana is a town and commune (municipality) in Bordj Bou Arréridj Province, Algeria.

It is the (approximate) location the ancient city and bishopric of Vardimissa, which remains a Latin Catholic titular see.

[1] Vardimissa (also spelled B- as n Greek) was important enough in the Roman province of Mauretania Caesariensis to become one of its many suffragan dioceses, but like most, faded completely, probably at the 7th century advent of Islam.

Two of its bishops are historically documented : The diocese was nominally restored in 1933 as Latin titular bishopric of Vardimissa (Latin = Curiate Italian) / Vardimissen(sis) (Latin adjective).

It is vacant, having had the following incumbents, so far of the fitting Episcopal (lowest) rank :