A bust of Alexander the Great.
National Geographic, 8.30pm
This is an interesting program. After his death in 323BC, Alexander the Great was entombed in a large mausoleum in Alexandria, the Egyptian city named in his honour. The tomb became quite the high-profile tourist attraction, with Julius Caesar and other Roman emperors visiting it to pay their respects. At some stage, though, the tomb seems to have vanished - references to it dry up in the 3rd century AD. Some pagans worshipped Alexander as a god and one theory has it that after Rome adopted Christianity, Alexander's tomb was taken over and rededicated in honour of St Mark the Evangelist. In the 9th century, a pair of Venetian merchants stole what they thought were the remains of St Mark and took them back to Venice. Might they have unwittingly stolen the remains of Alexander instead? This documentary is entirely inconclusive but it's fascinating nonetheless.