The Council of Rimini (also called the Council of Ariminum) was a local council of the early Christian church held in Ariminum (modern Rimini, Italy). The council was one of a number of councils during the middle of the fourth century that attempted to conciliate the continued disputes with adherents of forms of extreme Arianism following the First Ecumenical Council. The council was considered a defeat for trinitarianism, and St. Jerome wrote: "The whole world groaned and was astonished to find itself Arian."