Depending on the Protestant denomination (some are more favouring of a Christian design), most Protestant churches are plain and simple - Protestants generally don’t use the same statues or pictures or architectural designs as a kind of worship that Catholics use. The removal of these arty displays of worship was suggested around the time of the Protestant Reformation - and the removal was called Iconoclasm. Protestants saw any deviation from the Bible a bad thing or a distraction. There was actually a lot of religious hatred and violence from the Protestants toward the Roman Catholics - who liked to worship through statues and paintings. However, Lutherans and Anglicans were both not as keen on Iconoclasm and their churches allowed anything
