Many writers have attempted to put a specific date on the symbolic "end" of antiquity with the most prominent dates being the deposing of the last Western Roman Emperor in 476, the closing of the last Platonic Academy in Athens by the Eastern Roman Emperor Justinian I in 529, and the conquest of much of the Mediterranean by the new Muslim faith from 634–718. These Muslim conquests, of Syria (637), Egypt (639), Cyprus (654), North Africa (665), Hispania (718), Southern Gaul (720), Crete (820), and Sicily (827), Malta (870) (and the sieges of the Eastern Roman capital, First Arab Siege of Constantinople (674–78) and Second Arab Siege of Constantinople (717–18)) severed the economic, cultural, and political links that had traditionally united the classical cultures around the Mediterranean, ending antiquity (see Pirenne Thesis).