Grimidi was an ancient Roman town of the Roman province of Mauretania Caesariensis, located at 3.73031 35.87687 in North Africa. It flourished from about 30BC to about 640AD. Numerous ruins litter the site.

Bishopric The diocese of Tamazuca () is a suppressed and titular see of the Roman Catholic Church.Pius Bonifacius Gams, Series episcoporum Ecclesiae Catholicae, (Leipzig, 1931), p.468.Stefano Antonio Morcelli, Africa christiana, Volume I, (Brescia, 1816), p.304. It is presumed that the diocese of Tamazuca,David Cheney, Diocese of Tamazuca, at Catholic-Hierarchy.org was centered on the ancient town Grimidi in today's Algeria.Titular Episcopal See of Tamazuca, at GCatholic.org.

Known bishops have included:David Cheney, Diocese of Tamazuca, at Catholic-Hierarchy.org. Dacianus (fl.411) (A Donatist bishop who attended the Catholic/Donatist conference of 411.) Lucius (fl.484) A Catholic bishop who attended the 484 AD synod called by Huneric, king of the Vandals. John Bernard McDowell (1966–2010) Peter Chung Soon-taick (2013–2021)

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