Mades was among the many towns that were important enough in the Roman province of Numidia to become a suffragan bishopric, in the papal sway.
Its only historically documented bishop, Petrus, participated in the synod, called in Carthage by the Vandal Kingdom's ruler Huneric in 484, after which he went in exile, like many Catholic bishops, unlike their Donatist heretic counterparts.
Titular see
The diocese was nominally restored in 1933 as Titular bishopric of Mades (Latin = Curiate Italian) / Maden(sis) (Latin adjective).
It had had the following incumbents, so far of the fitting Episcopal (lowest) rank :
Antoine Grauls, White Fathers (M. Afr.) (born ?Belgian) (1936.12.23 – 1959.11.10) as last Apostolic Vicar of Urundi (Burundi) (1936.12.23 – 1949.07.14) and restyled only Apostolic Vicar of Kitega (Burundi) (1949.07.14 – 1959.11.10); next (see) promoted first Metropolitan Archbishop of Gitega (Burundi) (1959.11.10 – retired 1967.10.16); emeritate as Titular Archbishop of Giru Marcelli (1967.10.16 – death 1986.07.26)
Miguel Paternain, Redemptorists (C.SS.R.) (1960.02.27 – 1960.09.21) on emeritate; formerly Bishop of Melo (Uruguay) (1929.04.20 – 1931.08.11), then first Bishop of Florida–Melo (1931.08.11 – 1955.11.15), Bishop of Florida (Uruguay) (1955.11.15 – 1960.02.27); next 'promoted' Titular Archbishop of Acrida (1960.09.21 – 1970.10.19)
Geraldo Claudio Luiz Micheletto Pellanda, Passionists (C.P.) (1960.11.09 – 1965.03.20) as Coadjutor Bishop of Ponta Grossa (Brazil) (1960.11.09 – 1965.03.20); next succeeded as Bishop of Ponta Grossa (1965.03.20 – death 1991.01.02)
José Germán Benavides Morriberón (1968.11.30 – 1976.03.19) as Auxiliary Bishop of Archdiocese of Arequipa (Peru) (1968.11.30 – retired 1976.03.19), died 1985; previously Bishop of Chachapoyas (Peru) (1958.08.28 – 1968.11.30)
Joseph Phan Thế Hinh (1976.04.14 – 1985.11.14) as Coadjutor Bishop of Hung Hoá (Vietnam) (1976.04.14 – 1985.11.14); next succeeded as Bishop of Hung Hoá (1985.11.14 – death 1989.01.22)
Antonio Moreno Casamitjana (1986.04.22 – 1989.10.14) as Auxiliary Bishop of Santiago (de Chile) (Chile) (1986.04.22 – 1989.10.14); next Metropolitan Archbishop of Concepción (Chile) (1989.10.14 – retired 2006.12.27), died 2003
José Lanza Neto (2004.06.23 – 2007.06.13) as Auxiliary Bishop of Archdiocese of Londrina (Brazil) (2004.06.23 – 2007.06.13); next Bishop of Guaxupé (Brazil) (2007.06.13 – ...)