Notre Dame de Lorette, also known as Ablain St.-Nazaire French Military Cemetery, is the world's largest French military cemetery. It is the name of a ridge, basilica, and French national cemetery northwest of Arras at the village of Ablain-Saint-Nazaire. The high point of the hump-backed ridge stands 165 metres high and – with Vimy Ridge – utterly dominates the otherwise flat Douai plain and the town of Arras.
It is situated at Colline de Notre-Dame-de-Lorette, 62153 Ablain-Saint-Nazaire, France
The ground was strategically important during the First World War and was bitterly contested in a series of long and bloody engagements between the opposing French and German armies. It was the focal point of three battles.