The House of Rosenberg was one of the most powerful noble families in Czech history. They were the de facto rulers of Bohemia for much of the Middle Ages, but their dynasty came to an end with the death of the celebrated Petr Vok, in 1611. Now, archaeologists in South Bohemia, where the family had its seat, have come across their family tomb, and in doing so have set straight a well-known legend that surrounds them.