Page "Aeacus" Paragraph 4

A legend preserved in Pindar relates that Apollo and Poseidon took Aeacus as their assistant in building the walls of Troy.

When the work was completed, three dragons rushed against the wall, and while the two of them which attacked those parts of the wall built by the gods fell down dead, the third forced its way into the city through the part built by Aeacus.

Hereupon Apollo prophesied that Troy would fall through the hands of Aeacus's descendants, the Aeacidae.