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. planned for Nicomedia but eventually held at Seleucia Isauria.

The councils were called to resolve the Arian controversy which plagued the fourth-century early church. Arian creeds had been drafted in the Councils of Sirmium in 357 and 358, considered the highpoints of Arianism.

The Council of Seleucia was held in September 359, with 150 eastern bishops participating.

Council

The council opened on 27 May 359, It was hosted in the Cathedral of Santa Colomba, no longer extant, with Arian supporters worshipping at a chapel, traditionally reported to be a downtrodden area near the Arch of Augustus, known as , renowned for its prostitutes. of which 40 were pro-Arian at the start of the council. Gaudentius, the first Bishop of Rimini, participated in the Council; he was against Arianism. with seventeen other bishops, Gaudentius retreated to a nearby town, in another, he was stoned to death for perduellio.

Some sources attribute Taurus' appointment as a consul in 361 to his management of the Council of Ariminum.