Catholics are expected to attend Mass each week as an offering of themselves to God. The Mass recalls the Last Supper of Jesus with his disciples before his death when he gave them bread and wine and told them to do this in remembrance of him (1 Corinthians 11:24).
Besides a memorial of past events it is also a sacrifice, as Catholics believe that during the Mass the sacrifice of Jesus is re-presented and re-enacted.
The Mass has two main parts:
In the second part, bread and wine are offered to God, consecrated, and received by the congregation. An important prayer said during this part is the Lord's Prayer, also called the 'Our Father', which was taught by Jesus himself.