Petr Jakl writes and directs "Medieval", a new historical action-drama billed as the most expensive Czech Republic film ever made. In it, Ben Foster plays Jan Zizka, a Hussite general and Czech national hero who is considered one of the greatest military leaders and tacticians of his day. "Medieval" tells Zizka's story prior to his time as a renowned leader of a peasant revolt against a coalition of corrupt Catholic crusaders during the Bohemian Wars of the early 15th century.