NOUN (2)

1. an ancient Egyptian city on the Nile River that flourished from the 22nd century BC to the 18th century BC; today the archeological remains include many splendid temples and tombs;

2. an ancient Greek city in Boeotia destroyed by Alexander the Great in 336 BC;

WordNet (r) 3.0 (2006):

Thebes
    n 1: an ancient Egyptian city on the Nile River that flourished
         from the 22nd century BC to the 18th century BC; today the
         archeological remains include many splendid temples and
         tombs
    2: an ancient Greek city in Boeotia destroyed by Alexander the
       Great in 336 BC