The Ogre of Hyfor Three
From Tardis Wiki, the free Doctor Who reference
The Ogre of Hyfor Three was a large, silicon-based life form that invaded Earth in the 3rd century. It was defeated by The Doctor in the year "AD two hundred and something".
The oversized foot of the Ogre was on display in the British Museum in the early 21st century. The accompanying placard claimed that the foot was from a colossal acrolithic statue.
