every year Poste Magistrali dedicates a set of stamps to St. John the Baptist, patron saint of the Order of Malta. Referring to the Gospel of Matthew, John is depicted wearing a camel-hair tunic, often carrying the cross and the lamb, proleptic symbols of the sacrifice of the Son of God, the coming of whom he is the prophet.

Giorgio Vasari (1511 – 1574): Baptism of Christ.
Arezzo, Diocesan Museum of Sacred Art.
©2018: Foto Scala, Florence.

Series:
on the left stamp of the diptych: detail of Jesus in the act of receiving Baptism.
on the right stamp of the diptych: detail of St John the Baptist in the act of administering Baptism.

On the sheet: the painting in its entirety. On the stamp:
€ 2,55: detail of the angel on the left of the painting;
€ 5,40: detail of St. John the Baptist.