There are a number of documents titled De Fide Catholica concerning the Catholic faith.
Among them are:
The edict "De fide catholica" (Edictum de fide catholica issued by Emperor Theodosius on 27 February 380, establishing Catholic Christianity as the official religion of the empire.
The Tractate "De fide catholica" of Boethius (480-524 or 525)
De fide catholica ex Veteri et Novo Testamento contra Iudaeos by Isidore of Seville (560-636)
The Summa contra Gentiles, also known as Tractatus de fide catholica, contra Gentiles [contra errores infidelium], of Thomas Aquinas (1225-1274)
The Constitution "De fide catholica" of the First Vatican Council approved in April 1870 (also called "Dei Filius").
