One of the most baffling inscriptions has come down to us from the so-called ‘Passage of the Theôroi’ at Thasos. Situated at the north-eastern entrance of the ancient agora, and consisting originally of two walls on either side of a path paved by marble, the monumental passage way had a long list of names inscribed on the inside of its western wall; this is the so-called ‘great list of Thasian theôroi’. Two of its constituent lists bear the headings ἐπὶ τῆς πρώτης ἀπαρχῆς and ἐπὶ τῆς δευ[τέρη]ς ἀπαρχῆς| οἵδε ἐθεόρεον. The meaning of the word aparchê and the nature of the theôroi in question have been the subject of disagreement among historians. The aim of this article is to contribute further suggestions to existing discussions.