town complex of more than 2 ha in area.

It is possible that this complex consisted of two parts in the early medieval period - the Old Fort (Stjepan grad) and Mala gradina, and that this twin settlement lasted at least until the mid-tenth century. The earliest indirect source in writing on the Zahumlje forts, including Blagaj, is the "Treatise on Peoples" by the Byzantine Emperor and writer Constantine Porphyrogenitus,