Left: South chapel (definition)
Right: Sanctuary (definition). The sanctuary windows are also by Royal Art Institute for Stained Glass - Zettler - Munich

The Baptism of Jesus (iconography).
Top medallion (definition): God the Father watching John the Baptist baptizing Jesus (God the Son).
The Trinity (iconography) is completed by the Holy Spirit in the form of a dove (iconography) above Jesus' head.

Top medallion: God the Father

Architectural canopy features pinnacles (definition) and crockets (definition) in the tracery (definition) 

Note Holy Spirit in the form of a dove (iconography)

John the Baptist baptizing Jesus

Memorial window.
Note signature in lower right.

Signature: Royal Art Institute for Stained Glass - Zettler - Munich