Sentence:  I would like to give this dissertation on the <WSD>apostolic</WSD> world of thought in early Christian iconography the subtitle of 'In the land of the blessed' —'Μακάρων ἐνἱ χώρῳ'. 
Meaning of the word marked with <WSD> tags:  Pertaining to apostles or their practice of teaching; pertaining to the apostles (of early Christianity) or their teachings.