A prince wanted to marry a real princess and traveled the world searching for one. During a storm, a woman arrived at the city gate claiming to be a princess. To test if she was real, the queen placed a pea under 20 mattresses and 20 beds for the woman to sleep on. In the morning, the woman said she barely slept because something hard was in the bed, showing she felt the pea and proving she was a real princess. The prince then married her.