This article deals with the transformation of Western Agora of Xanthos in the Byzantine period through two different groups of buildings with commercial and religious functions, whose historical associations were revealed with archaeological finds in the excavations of the Western Agora. Evaluations made at this point show that in the first half of the 5'h century A.D. the agora was transformed into a central area that, in the context of a non integral composition, became a large religious complex as well as a center of private commercial activity. Evidence also shows that all these new areas within the former agora were then abandoned in the 7th century and remained without significant activity until the 10th century. Then this area was converted into a small settlement comprised of simple residential places and workshops utilized in the 10th and 11th centuries. That material finds for the 13th century are only a few ceramics from the Byzantine and Seljuk cultures indicates the presence of a nomadic culture in the area.