 It has also been suggested that the use of cupids on the keystone of arches was common in public buildings of the period in Venice, which "stresses the official nature of St. John's imprisonment and execution".The presence of a maidservant is usual in depictions of Judith (following the Book of Judith, which mentions her), but not in those of Salome with the head of John the Baptist.On the other hand, the head on a dish is normally associated with Salome's story, and is mentioned in the gospel, while Judith often puts hers in a sack, or carries it by the hair, both also following the text of their story.