Women in ancient Persia were not only highly respected but, in many cases, considered the equals of males. Women could own land, conduct business, received equal pay, could travel freely on their own, and in the case of royal women, hold their own council meetings on policy. Titles of respect accorded to royal Persian women seem to have derived from the earlier Elamite culture and, most likely, the Median Empire which was the immediate precursor to the Achaemenid Persian Empire (c. 550-330 BCE) founded by Cyrus the Great (r. c. 550-530 BCE). Cyrus established the Persian paradigm of freedom of religion and expression in his empire but was also responsible for maintaining the dignity and autonomy of women of every class. This same paradigm was maintained by the Parthian Empire (227 BCE - 224 CE) although, because of a loss of records and artwork following Parthia's fall to the Sassanian Empire (224-651 CE), not as much is clearly known of the details of women's lives during this period. The Sassanian period is well-documented, however, and women's rights were maintained at the same level – or higher – than during the Achaemenid Empire. Persian women would continue to enjoy this high status in ancient Persian culture until the fall of the Sassanian Empire to the invading Arab Muslims in 651 CE. Afterwards, the long-standing recognition of women as autonomous individuals, capable of deciding their own fate, was replaced by the concept of women as second-class citizens, inherently sinful, and requiring male guidance and control.