The main worship service in Catholic Churches is the Mass and the main worship service in many Orthodox Churches is called the Divine Liturgy. In both of these Churches, along with the other parts of worship, the Eucharist or Communion is central. Here a priest by prayer asks God to change a small amount of bread and wine into what Catholics and Orthodox believe is Jesus's real body and blood, but without changing the accidents (appearance, taste, colour, etc.) of the bread and wine. Then the people each may receive a portion. Many Protestant churches have worship services similar to the Mass, some every week, others a few times a year. Some Protestants believe Jesus is really present at the Communion service, and some believe the bread and wine are symbols to help them remember what Jesus did