Which church leaders were mainly involved in the First Council of Nicaea?

The First Council of Nicaea, convened in 325 AD, primarily involved bishops from across the Roman Empire. This gathering was significant as it aimed to address and resolve various theological disputes, particularly concerning the nature of Christ and his relationship to God the Father, as well as to establish a unified Christian doctrine.

The involvement of bishops was crucial because they were the leaders of local churches and held significant authority in theological matters. The council brought together approximately 300 bishops, representing different regions and communities, making it an assembly that truly reflected the diversity of early Christianity while seeking to create a cohesive point of reference for the faith.

While the other groups mentioned, such as the Pope, cardinals, monks, or lay leaders, played various roles in the church, they were not the primary participants in this specific ecumenical council. The focus on bishops highlights the importance of ecclesiastical authority and the structured hierarchy within the early church, which profoundly influenced subsequent councils and doctrinal developments.