Antiochia ad Orontem in Syria, 5-4 BC., Augustus, As, RPC 4251.

Antiochia ad Orontem in Syria, Augustus,
Æ21 / As (21-23 mm / 7.13 g), 5-4 BC.,
Obv.: KAIΣA[P ΣEBAΣTΩ - APXIEP]EI , laureate head of Augustus r.
Rev.: ARXIE / PATIKON / ANTIO / XEIΣ / ZK (date ZK = year 27 of the Actian Era = 5/4 BC) , all in a wreath of an archiereus.
RPC I, 4251 ; BMC 135 ; SGI 109 .

"The people of Antioch (dedicate) to Caesar Augustus, priest at Antioch, the appropriate archieretic wreath." - Refers to the acception of the title archiereus by Augustus. Obv. and rev. legends should be seen together:
KAISARI SEBASTW ARCHIEREI ARXIERATIKON ANTIOXEIS
ANTIOXEIS = subject of the sentence = "the people of Antiochia"
KAICARI SEBASTW ARCHIEREI = dative object of the sentence = "to Caesar Augustus, the Archiereus" (added: "dedicate")
ARXIERATIKON (added STEPHANON) = accusative object of the sentence = "the archieratic (wreath)"

The Actian era is counted from the battle of Actium.