The most famous example of a king marrying his sister is King Tutankhamun of ancient Egypt. He married his half-sister, Ankhesenamun, to maintain the royal bloodline and ensure stability within the Egyptian kingdom.
While incestuous marriages were common in ancient Egypt, they were often done for political and religious reasons rather than personal preference.
It's important to note that incest is considered taboo in many cultures today and is often illegal.
