The mythical hero credited with founding the city of Thebes in Greek mythology is Cadmus. Known for his journey to find his sister, Europa, Cadmus is instructed by the oracle to follow a cow and establish a city where it rests. He is celebrated for introducing the alphabet to the Greeks, emphasizing the importance of literacy and knowledge. His story underscores themes of search, innovation, and the struggles faced in fulfilling one’s destiny. Cadmus's legacy is vital in Greek myth, as he represents the link between ancient cultural practices and the development of civilization.