In the 300's, the Romans began to tolerate Christianity, and crosses were widely displayed. During the early Middle Ages, Christian artists made crosses as symbols of the Christian belief in the Resurrection of Christ. Many of these crosses portrayed the risen Christ wearing priestly clothes and a royal crown. Later, Christians began to emphasize the sufferings of Jesus in crucifixes. A crucifix is a cross with an image of the dying Jesus.
Crosses have a number of uses in Christian worship.
A cross on a staff is carried in many processions. During some ceremonies, members of the clergy or worshipers trace the shape of a cross with a hand or certain fingers. Cathedrals and many churches have floor plans based on the shape of the Latin cross. When I traveled in Europe for business, I noticed that the Churches didn't have crosses on the top of them, in the city of Amsterdam in the Netherlands. So I asked the tour guide about it.