The characteristics of this group can be observed on the SiphnianTreasury(英语:SiphnianTreasury) which is dated on external evidence before 525 BC, therefore
Provisional Thoughts on Interdependencies of Storytelling on the SiphnianTreasury and the Athenian Parthenon". In Bäbler, Balbina; Nesselrath, Heinz-Günther