عنوان مقاله [English]
This study investigates the thematic structure in Middle Persian Texts based on Halliday’s approach. Accordingly, it could be investigated that what changes have happened in the thematic structure during the process of Language development. Halliday and Mathiessen (2014) claim that the theme is the point of departure. In order to do this study, tow texts of kārnāmag i ardešir bābakān (Text 1) and dinkar šašom (Text 2) were chosen. The results suggest that the highest occurrence of themes belongs to the unmarked multiple theme (almost 65% in both texts) with the pattern of “Textual theme + Topical theme” (70.27% in Text1 and 60.83% in Text2). Based on this fact it could be claimed that in that rea this pattern was used to transfer the message. The occurrence of interpersonal themes is low in kārnāmag i ardešir bābakān (16.21%) but high in dinkar šašom (39.16%). Another significant point in dinkar šašom is the occurrence of discrete themes, that is, some part of the theme sits at the first part of the sentence, then other part of the sentence, and other part of the theme at the end. In addition, the investigation of marked and unmarked features in Middle Persian Texts and comparing theme with Modern Persian indicate changes in the groups sitting in unmarked and marked position in a sentence. It could open a way for cognitive studies.