The coming of Islam followed the Muslim conquest of Egypt, but there is no visible change at any specific time in the oasis.

The position of the Oasis on the trade routes between the Nile Valley and places west and south of Egypt brought prosperity to towns like el-Qasr with its large urban houses, mosques, madrasa or college, law court and other public buildings.

The Dakhleh Oasis Project has been engaged in restoration and reconstruction work in el-Qasr in the course of which many documents have been recovered giving valuable insights into life in the town and indeed on the Oasis generally during the Seventeenth and Eighteenth Centuries.

Many objects, particularly documents, are being recovered, which give valuable insights into life of the town during the Seventeenth and Eighteenth Centuries C.E. The documents include legal judgements, private letters and commercial matters.