This is the oldest part of the Wawel cathedral. The crypt is a part of not existing cathedral of Władysław Herman from XI century. In the crypt the oldest grave of the bishop Maurus was found (1118).
In the crypt the prince Joseph Poniatowski rests. One legend says that a which gave a prophecy that he will be killed by a magpie. Indeed, he was fighting with anti-Napoleon troops, shoot, fall down his horse and drown in Elster river. Elster in German means magpie.
Next to him another famous Polish - Tadeusz Kościuszko is burried. Kościuszko is a hero for both Polish and American, as in Poland he waged war for independence, after collapsing the uprising he escaped to the United States where he fight for independence of the US.
In the cript also Władysław Sikorski is burried. He died in a plane in Gibraltar. It was or an accident or asessment by order of British who did not let the information about Katyń to be known.
In the cript another Polish are burried. The king John III Sobieski is buried next to his wife Maria Kazimiera. And next lies the king Michael Korybut Wiśniowiecki. He lies alone because he died as 33 years old man and his wife got married for the second time with Karol V of Lorraine and now her remnants are next to her second husband.