Rudolph II (18 July 1552 – 20 January 1612) had a royal menagerie in which he kept lions, wolves and panthers. An assistant to the head keeper was a man named Janek. Janek was dumb but had a way with animals. He was particuarly fond of the wolves. Despite never uttering a word in human speech he would ofter howl with the wolves.
One day he vanished and a massive wolf was seen roaming the area. People thought that Janek had been killed but he was later found unconcious under at tree. Each time Janek dissapeared the wolf returned and later the man would be found in a swoon. The head keeper realised Janek had become a werewolf.
Soon the beast left the grounds and was prowling further afield, and attacks on humans by a massive wolf were reported. One gamekeeper called Rickany was killed and when what was left of him was buried, a wolf was heard howling at his funeral. The werewolf was never slain and legend has it that it still prowls around the leafier areas of Prague.