Notes:

Old Man Danaus's Crowd of Daughters
We learn from other sources that these statues of the fifty young women were accompanied by their father in the portico and by their husbands, ill-fated heads of households. See two statues of Danaids.

Myron
The Greek sculptor Myron was famous in antiquity for his bronze statues of animals, though these have not survived. We know him best through Roman copies of his statue of the Discobolus.

Fallen Gauls
What's suitable about fallen Gauls on the Temple of Apollo? Pausanius tells us that the Celts, later to be called Gauls, attacked Apollo's sanctuary at Delphi on the slopes of Mr. Parmassus, hoping to steal the treasures dedicated to the god, but were repelled. A second version is found in Cicero (Div. 1.81): “ [When Brennus attacked] The Pythian priestess, they say spoke from the oracle, ‘The white maidens (Athena and Artemis) and I will see to this matter.’ And it is said the maidens were seen fighting against the Gauls and that the army was overwhelmed by snow.” The act of the Gauls was therefore not only a sacrilege committed against Apollo but also one avenged by Apollo's twin, Diana (Artemis). To see how the Gauls were depicted by earlier artists take a look at this Roman copy of a dying Gaul, based on sculptures at Pergamon.

Grandchildren of Tantalus=the Children of Niobe
What's the point of this mass killing on the door of this temple? Niobe's seven sons and seven daughters were killed by Apollo and Diana because of Niobe's sacrilegious boasting. Again, the point seems to be that sacrilege, or blasphemy, against Apollo, or his family, is punished most severely. (Just as Apollo Actius helped to “punish” Marc Antony and Cleopatra for attacking the god's Roman “family” led by Augustus?)