It is clear from the passage that the story of the princess ----.

One of the most familiar sights in İstanbul is perhaps
the one least visited. This is the Maiden's Tower,
which is called “Kız Kulesi” in Turkish. It stands on a
little island of rock a few hundred metres off Üsküdar.
Its Turkish name is derived from an ancient legend
concerning a princess who was confined there by her
father to protect her from a terrible prophecy; the
prophecy was that she would die from the bite of a
snake. However, despite every precaution taken for
her safety, she was eventually bitten by a snake
which had been smuggled out to the tower in a
basket of grapes.