Golem

The Golem was a giant being roaming the city of Prague during the late 16th century.

According to the people of Prague, the giant hunted noblemen and alchemists, which instilled great fear in their hearts. One day, when a group of alchemists was escorted by guards, Elizabeth Jane Weston - the stepdaughter of the alchemist Edward Kelley - bumped into the Golem, which caused him to spare her stepfather's life. He jumped into the river nearby, and left no trace of himself behind.

Source

 * Assassin's Creed: Project Legacy - Divine Science: Chapter 3 - Elizabeth Jane Weston