Catholics worship God is many ways, but the primary act of communal worship is the Holy Sacrifice of the Mass. It is the source and summit of our Catholic faith.  Jesus told us at the Last Supper to do "this".  
 

• A more complete history of the Mass can be found in the Catholic Encyclopedia. 

• The USCCB (United States Conference of Catholic Bishops) provides a good description for those who would like more information about the Mass.

•  CLICK HERE to join in the celebration of the Eucharist online. Hear the words of the Gospel, reflect on the daily homily, and worship God in the Eucharist.