The fourth Joyful Mystery is the Presentation of Jesus to the Temple.  Mary and Joseph brought Jesus to the Temple according to Jewish law and gave him the name Jesus. 

As an offering, Joseph being a poor man brought two turtle doves for sacrifice. 
A cloth can be seen in the background representing the Temple. 

The lower left window pane is Elijah’s Chariot of Fire.  According to the Bible,
Elijah ascended into heaven on his Chariot of Fire.  
The lower right window shows the doves that are brought by Joseph as an offering. 
The doves are also seen in the rose window at the front of the church.