Eugène Lefèvre-Pontalis ( - ) was a French medievalist and archeologist.

Following his studies at the Lycée Condorcet

Lycée Condorcet

The Lycée Condorcet is a school founded in 1803 in Paris, France, located at 8, rue du Havre, in the city's IXe arrondissement. Since its inception, various political eras have seen it given a number of different names, but its identity today honors the memory of the Marquis de Condorcet. The...

, he entered the École Nationale des Chartes

École Nationale des Chartes

The École Nationale des Chartes is a grand établissement, an elite French university-level educational institution based in Paris. It provides education and training for archivists and librarians and forms part of the University of Paris.-History:...

where he wrote a thesis on religious architecture in the ancient Diocese of Soissons

Soissons

Soissons is a commune in the Aisne department in Picardy in northern France, located on the Aisne River, about northeast of Paris. It is one of the most ancient towns of France, and is probably the ancient capital of the Suessiones...

 in the 11th and 12th centuries. Then he worked with Silim, architecte des Monuments Historiques.

In 1894, he became assistant in medieval archaeology at the École Nationale des Chartes. In 1911 he became the professor.

In 1911, he became president of the Société française d’archéologie and, in 1916, of the Société nationale des antiquaires. He founded the Société des amis de la cathédrale de Reims to help restore the Cathedral of Notre-Dame, Reims after World War I.

At his death, he gave his photographs to the Société française d’archéologie.