 After spending three years in Rome, Athanasius went to Gaul to confer with Hosius.From there, they went to the Council of Serdica, which began in the summer, or, at latest, in the autumn of 343.Hosius presided over the council of about 170 bishops, of whom about 90 were mostly of the Western Homoousian faction and about 80 were mostly of the Eastern Eusebian faction.