It Has been suggested many times that the early church did not believe in the Trinity and that this doctrine was born at the Council of Nicea in 325 AD. Aside from the fact that we get the doctrine of the Trinity from the Bible and not from a council, there is a large amount of historical quotes from early church father and also from external sources that prove that the church believed in the Trinity and also the deity of Jesus hundreds of years befor the council took place. Follow the link below to see these for yourself.
One of the many proofs for Jesus being God is found in the use of God's name which is Yahweh and that being applied to Jesus. Follow the link below to find out more.
Book by Robert M. Bowman Jr and J. Ed Komoszewski.
This book takes a look at the evidence that is found in the Bible for the deity of Jesus. There is a staggering amount of detail in the Bible on this subject.