Scillium is an ancient city in the Roman province of Africa Proconsularis, Scillium must not be confounded with Silli, or Sililli, in Numidia, the situation of which is unknown[1] nor, as Albert Battandier does,[2] identified with Kasrin, which is Cillium, a see of Byzantium.

Two of its bishops are mentioned: Squillacius, present at the Conference of Carthage in 411; and Pariator, who signed the letter addressed in 646 by the council of the proconsulate to the Patriarch Paul of Constantinople against the monothelites.

The town is mentioned in the seventh century by Georgius Cyprius[5] under the name of Schele.

[8] Scilium is the spelling that appears in the 2013 edition of the Annuario Pontificio[9] and some other recent sources.

[10] Other sources also report the Scilitan or Scillitan Martyrs not as six but as twelve and as having been tried and executed in Carthage.