Leo the Mathematician
... that Leo the Mathematician, called by some the cleverest man in 9th-century Byzantium, invented a system of beacons to warn of Arab raids and a fabled levitating throne for the emperor?
... that <b id="mwCbk"><a href="./Leo_the_Mathematician" id="mwCbo" rel="mw:WikiLink" title="Leo the Mathematician">Leo the Mathematician</a></b>, called by some the cleverest man in 9th-century <a href="./Byzantine_Empire" id="mwCbs" rel="mw:WikiLink" title="Byzantine Empire">Byzantium</a>, invented a system of beacons to warn of Arab raids and a fabled levitating throne for the emperor?