Christians are monotheistic. They believe in one god. Their holy book is called The Bible and their holy land is Jerusalem.
The church has all power. It was created by Jesus so you have to listen to it. Not following the rules or questioning the church leads to hell/ excommunication. All salvation comes through the church
The holy war between Christians and Muslims. If you fought you would have gone to heaven. They accomplished trade and goods. They spread diseases through out the middle east.
This was started by Martin Luther posting the 95 thesis on the churches door. The 95 thesis states 95 ways why the church is wrong. Martin believed the church was corrupt and that the Bible holds all knowledge.