The Fourth Joyful Mystery of the Rosary is the Presentation in the Temple, which we celebrate on February 2 as the Presentation of the Lord or Candlemas.
At the top of the window is a symbol of the ark of the covenant. The Ark of the Covenant, which used to be housed in the Jerusalem Temple, had been missing since Jeremiah hid it from invading marauders in 586 BC.
The lower half of the window presents the true Ark, the Ark of the New Covenant, Mary, who is was now entering the temple with her divine Son. She brought the Light of the World into the world.
At the bottom of the second and top of the third sections you will see a hand pointing down to Jesus. A hand with two fingers folded depicting Jesus’ 2 natures [divine and human] and three fingers folded representing the three persons in the Blessed Trinity. This hand connects the ark of the Old Testament with the ark of the New Testament.
Practically, this scene represents Jesus, like all Jewish firstborn sons, was consecrated to the Lord. Mary and Joseph took the child to the temple in Jerusalem at the time he was to be circumcised. Simeon the priest is depicted holding the Christ child while Mary, Joseph, and Anna the prophetess watch. [see LK 2:22-40]