Orillon
![At the lower edge of the 1908 OS map of the Flat Bastion in Gibraltar is an orillon covering a retired flank and the Prince Edward's Gate in the Charles V Wall.](/Images/godic/202501/31/Flat_Bastion_Map_19084048.png")
![The Flat Bastion (upper) and South Bastion (lower) on the Charles V Wall. Each has an orillon and a retired flank.](/Images/godic/202501/31/Charles_V_Wall,_16084048.png")
An orillon, also known as an orillion, is an architectural element of a military fortification. The ear-shaped projection of masonry provided defense for guns and soldiers at the flank of a bastion. However, an orillon could also shield a city gate.