is only about royal women, whose position shows many similarities to their predecessors in the Achaemenid Empire and their successors in the Sasanian Empire. The Parthian kings were polygamous and had several wives with the title “queen” (referred to with the Babylonian spelling šarratu or the Greek basilisse), as well as concubines. It is known that kings often married their sisters, but it is unknown if they were the kings' full sisters or half sisters. According to Roman sources, Parthian kings had harems full of female slaves and hetairas secluded from contact with men, and royal women were not allowed to participate in the royal banquets. Whether the royal women lived in seclusion from men is unknown, as no evidence of that has been found, but it is known that women at least participated in the royal banquets as entertainers, as women are shown in archeological images entertaining at such occasions with music and dance. It is assumed that royal Parthian women could own and manage their own property, land and manufactures, as could their predecessors in the Achaemenid and Seleucid Empire and their successors in the Sasanian Empire. It is fully attested that royal women, as well as noblewomen, accompanied their husbands in battle with their own entourage. This was the reason why female members of the royal family could sometimes be taken captive by enemies and had to be ransomed, such as the famous occasion when the daughter of King Osroes was held captive by emperor Trajan from the occupation of Ctesiphon in 116 until 129, but also the reason why kings sometimes killed the women of his company after a defeat to prevent them from being taken prisoners. Royal women appear to have been less included in royal representation. Artwork depicts royal women dressed similarly to those of the Achaemenid period: in long-sleeved, many-folded dresses tied by a belt, with a tiara or a veil hanging down their back. While their names and titles did appear in official documents, Parthian women were rarely depicted in art. Only two royal women were ever depicted on Parthian coins: queen Musa of Parthia and queen Anzaze of Elymais. Only two women are known to have ruled the Parthian Empire, one as monarch and one as regent. Musa of Parthia is the only woman confirmed to have ruled as queen regnant of the Parthian Empire, while Rinnu, mother of underage king