Saint Mammes of Caesarea was a child-martyr of the 3rd century, who was martyred at Caesarea. His parents, Theodotus and Rufina, were also martyred.

Langres Cathedral is a Roman Catholic church in Langres, France. It was erected in the twelfth century, and is dedicated to the 3rd-century martyr Mammes of Caesarea. The cathedral is the seat of the Bishop of Langres, and is a national monument. The nave and interior are in the Romanesque and French Gothic style while the later facade is an example of French Neoclassical architecture