The symbol of the City of Lincoln, the county town of Lincolnshire.
According to a 14th century legend two mischievous creatures called imps were sent by Satan to do evil work on Earth. After causing mayhem elsewhere in Northern England the two imps headed to Lincoln Cathedral where they smashed tables and chairs and tripped up the Bishop. When an angel appeared and told them to stop, one of the imps was brave and started throwing rocks at the angel but the other imp cowered under the broken tables and chairs. The angel turned the first imp to stone giving the second imp a chance to escape.
If you visit the cathedral today you can still see the imp that was turned to stone - but I'm not going to spoil it for you by telling you where to look.
An 1899 reproduction of the Lincoln Imp also overlooked the Front Quad of Lincoln College, Oxford until 2000 when it was transferred to the bar (Deep Hall) and another Imp was erected in the traditional position above the entrance to Hall. This has given rise to a traditional Oxford expression: 'to look on someone like the Imp looks over Lincoln' as well as giving rise to the title of the college's undergraduate newspaper: The Lincoln Imp.