What is eastern?

Answer 1

Eastern Orthodoxy is just as old as Catholicism. Before 1054 there was simply the Church. No separate denominations or anything. Afterwards, the Catholic and Orthodox churches were formed and later differences in tradition and theology arose. For example, the Catholic Pope is infallible, the Orthodox use a different calendar to calculate Easter, and the Orthodox still use tradition Byzantine style when painting their icons. There are many differences and yet both churches hope to reunite someday to restore the Christian faith to it's once universal state.