<Li> Readmission to the Church of heretics and schismatics: including issues of when reordination and / or rebaptism were to be required </Li> <Li> Liturgical practice: including the place of deacons, and the practice of standing at prayer during liturgy </Li> <P> The council was formally opened 20 May, in the central structure of the imperial palace at Nicaea, with preliminary discussions of the Arian question . Emperor Constantine arrived nearly a month later on 14 June . In these discussions, some dominant figures were Arius, with several adherents . "Some 22 of the bishops at the council, led by Eusebius of Nicomedia, came as supporters of Arius . But when some of the more shocking passages from his writings were read, they were almost universally seen as blasphemous ." Bishops Theognis of Nicaea and Maris of Chalcedon were among the initial supporters of Arius . </P> <P> Eusebius of Caesarea called to mind the baptismal creed of his own diocese at Caesarea at Palestine, as a form of reconciliation . The majority of the bishops agreed . For some time, scholars thought that the original Nicene Creed was based on this statement of Eusebius . Today, most scholars think that the Creed is derived from the baptismal creed of Jerusalem, as Hans Lietzmann proposed . </P>

Where did the council of nicea take place