Religion is an importamt sitition for architecture.In the past, people did architecture for religion, as well.Christianity was the offical religion in Rome. People of Rome created church.In the Constantine which is The First Christian Emperor had streets were lined with colonnades, which instead of an entablature carried a series of arches. Diocletian’s architects inserted an arch into the pediment between the two central columns, creating a fastigium, a stage-like space, for the imperial appearances.Churches appeared modest and unassuming on their exteriors.Only their interiors, brimming with mosaics, painting and marble colonnades marked that design with a strong design skill.