Serabit el-Khadim is a locality in the southwest Sinai Peninsula, Egypt, where turquoise was mined extensively in antiquity, mainly by the ancient Egyptians. Archaeological excavation, initially by Sir Flinders Petrie, revealed ancient mining camps and a long-lived Temple of Hathor, the Egyptian goddess who was favoured as a protector in desert regions and known locally as the mistress of the turquoise. The temple was first established during the Middle Kingdom in the reign of Sesostris I and was partly reconstructed in the New Kingdom.