The message brought by the angel Gabriel to Mary recorded only by Luke (1: 26–38) that she would be the mother of a son who would be ‘great’ and called ‘the Son of the Most High’. The appearance of the angel has been a principal subject of Christian iconography from the earliest times e.g. in the 6th cent. mosaics of Parenzo cathedral. The theological importance of the story is in Mary's acceptance of her vocation.