The earliest dated decree-class document in the matrix-hub corpus (c. 500 BCE). A bronze tablet from Olympia recording a 100-year alliance between the Eleans and the Heraeans, in Elean Doric dialect with retained digamma (ϝ). The opening formula ἁ ϝράτρα — "this is the covenant" — establishes a stable inter-state-treaty genre five centuries before its Hellenistic and Roman descendants.[ZH pending]