Council of Ariminum

The Council of Ariminum, also known as the Council of Rimini, was an early Christian church synod in Ariminum, modern-day Rimini, in 359. Called by Roman Emperor Constantius II to resolve the Arian controversy, the Council of Ariminum for western bishops paralleled the Council of Seleucia for eastern bishops.

Though the Council of Ariminum concluded in favour of the Nicene Creed by 21 July 359, its consensus was overturned on 10 October 359, when the council's envoys to Constantius accepted a Homoean creed. Bishops remaining at Ariminum were forced to assent to the creed. Pope Liberius later declared that the Council of Ariminum was held without authority.