The Diocese of Zella () is a suppressed and titular see of the Roman Catholic Church.Zella at www.catholic-hierarchy.orgZellae at www.gcatholic.org The diocese of Zella, is located in today's Tunisia.
During the Roman Empire the Diocese was centered on a Roman town of the Roman province of Byzacena. During late antiquity the city had both a Donatist and Catholic congregation. These two both sent bishops to the Conference of Carthage of 411.Stefano Antonio Morcelli, Africa christiana, Volume I, (Brescia, 1816), p. 370Pius Bonifacius Gams, Series episcoporum Ecclesiae Catholicae, [Leipzig, 1931), p. 470.
Today Zella survives as a titular bishopric and the current archbishop, personal title, is Samuele Sangalli, who is Adjunct Secretary of the Dicastery for Evangelization.
Known bishops Donaziano † (fl411) Natalico † (fl 411) (Donatist bishop) Franz Brazys (1964–1967) Cesare Zacchi (1967–1974) Angelo Acerbi (1974–2024) Samuele Sangalli (2025–present)
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