orillon

However, an orillon could also shield a city gate.

An orillon, also known as an orillion, is an architectural element of a military fortification.

An orillon was generally built at the flank of a bastion, close to the adjacent defensive wall.

The curve of an orillon is convex and it may be semi-circular or squared-off in shape.

It was constructed adjacent to the retired flank and behind the orillon of the bastion's west wall, which aided in the gate's defence.

The French Spur was originally an ear-shaped bastion known as an orillon, and contained gun emplacements which protected the main spur.

The gate was positioned adjacent to the retired flank of the bastion, behind the orillon of its west wall (pictured in OS map at right), to aid in its defence.

These fortifications include this and Orillon Battery, Hanover Gallery, Kings and Queens Galleries, Star Chamber, Commons Hall and St. Patrick's Chamber.

The two bastions along the Charles V Wall each have an orillon and a retired flank on their opposing faces, the west wall for the Flat Bastion and the east wall for the South Bastion (pictured at right).