The word Christianismus , a Greek loanword from Χριστιανισμός (‘Christianity’), is scarcely used in late-antique Latin literature, in comparison to other words, such as Christianitas . This entry investigates the attestations of this word, which is mostly used in opposition to Iudaismus , and the reasons of its limited use.
Gianmario Cattaneo (Fri,) studied this question.