It's known as the First Ecumenical Conference. The word ecumenical comes from the Greek word for the inhabited earth. So you can view it as the church leaders from the inhabited earth in order to create a consensus about what it means to be a Christian. And Arius of Alexandria was there to defend his position, but the majority of those there did not like his point of view. So they declared Arius' beliefs as heresy and they exile him. And to be very clear that they do not believe that the Son is of a different substance of the Father, they issue the Nicene Creed. So what I have here, this is known as the Nicene Constantinopolitan Creed.