The second legend tells:

While laying the foundation of the town the prophets demanded to sacrifice the brightest young man.
Only then the town would become famous and unconquerable.

The young man who was chosen for this deed stood up at the bottom of the foundation pit, and said, he agreed to lie down under the foundation of the castle, only if the prophets guessed three riddles:

what was the sweetest in the world?

what was the easiest in the world?

and what was the hardest?

The prophets without any doubt decided that

the sweetest was honey,

the easiest was a dawn,

the hardest thing was the foundation stone.

The young man did not agree and explained, that

the sweetest thing was mother's milk for a baby,

the easiest thing was a baby on mother's hands

and the hardest thing was mother's sacrifice of her only son's heart.

They were taken aback by the young man's wisdom and told him to get out of the foundation pit.

But the prophets did not give up. In order to make the castle very strong and unconquerable, it was decided to sacrifice the brightest and the most beautiful Lithuanian girl.

Soon such a virgin was found and she agreed to be offered, only she asked to pick up a bunch of nicest meadow flowers.

As soon as she stepped into the pit a large corner-stone was rolled.

How surprised all were to see the girl standing quite safe and fit. Only the stone beat the bunch off her hands.