The four low relief carvings on the side wings of the Mary altar are clockwise from bottom left:
Annunciation — the archangel Gabriel informs Mary that she is pregnant with the son of God.
Visitation — Mary visits her cousin Elizabeth, who is pregnant with the later John the Baptist.
Nativity — Jesus is carved remarkably small, often the baby is oversized in these works.
Presentation — Jesus is presented in the temple. Note the dove in Josef’s hand — not the holy spirit but rather the offering of the poor.