. "early 4th century, rebuilt 1237 CE" . "Qasr al-Azraq (Arabic: \u0642\u0635\u0631 \u0627\u0644\u0623\u0632\u0631\u0642\u200E, \"Blue Fortress\") is a large fortress located in present-day eastern Jordan. It is one of the desert castles, located on the outskirts of present-day Azraq, roughly 100 km (62 mi) east of Amman.Its strategic value came from the nearby oasis, the only water source in a vast desert region. The name of the fortress and associated town came from these."@en . . "Qasr al-Azraq"@en . . .