Each sequence of beads is called a decade, and a set of rosary beads usually has five decades. As they progress through the decades, Catholics reflect on some of the important events in the life of Jesus and of Mary. It is a form of meditation. These events, called mysteries, are in groups of five. For example, the joyful mysteries are the Annunciation (Gabriel announcing that Mary was pregnant with Jesus), Mary’s visit to Elizabeth, the birth of Jesus, the presentation of the baby Jesus in the temple and the finding of Jesus in the temple