Saint John the Baptist.
"O God, who raised up Saint John the Baptist to make ready a nation fit for Christ the Lord, give your people, we pray, the grace of spiritual joys and direct the hearts of all the faithful into the way of salvation and peace. Through Christ our Lord. Amen." – Collect for the feast of St John the Baptist. Painting on the ceiling of the Co-Cathedral of Valletta, Malta.
Source: Lawrence OP on Flickr