I thought I can only see these Medieval costumes in films or movies. I finally saw a lot of men and women wearing these costumes during the Landshuter Hochzeit, also known as Landshut Wedding Festival. This festival is not only famous in Germany but in whole Europe as well. This event only takes place every four years.
I already posted some photos and updates in my Euro Travel and Explore Germany sites. Feel free to visit them. More updates soon!