Answer: Constantine "started a new branch" before it collapsed. When the Roman Empire collapsed the Christian church split because they couldn't agree with each other on which was right, and which was the better branch.
Explanation: Cerularius’s ex-communication was a breaking point in long-rising tensions between the Roman church based in Rome and the Byzantine church based in Constantinople (now called Istanbul). The resulting split divided the European Christian church into two major branches: the Western Roman Catholic Church and the Eastern Orthodox Church.