Hebrard studied at the École des Beaux-Arts, and in 1904 won the Grand Prix de Rome, allowing him to study at the Académie de France in Rome, located in the Villa Medici. It was here that he chose to study Diocletian's palace at Split, eventually leading to the 1912 publication of a monograph containing what is still regarded as the most accurate image of the original appearance of the Palace. At the Academie, he was a few years behind Henri Prost, later famed as the planner of Casablanca, and together with other members of the reformist Musée social, he developed an interest in the possibilities of town planning.
Work in Greece
During WW1, in 1916, Hebrard had been conscripted as the Director of the Archaeological Service of the Army of the Orient based in Thessaloniki, and so was present when the majority of the city was largely destroyed in the Great Fire of 1917. The Greek Prime Minister Eleftherios Venizelos forbade the reconstruction of the city center until a modern city plan was approved. He commissioned Ernest Hébrard for the work, which the architect conceived and developed with the aid of the Greek architects Aristotelis Zachos and Konstantinos Kitsikis, as well as British designer Thomas Hayton Mawson and fellow Frenchman Joseph Pleyber. The plan did away with the medieval and Ottoman street layout, imposing instead a plan of formal boulevards, in a symmetrical pattern about a central axis, carefully composed around the most important ancient Byzantine churches and mosques. Hébrard taught at the National Technical University of Athens, and his work is well known in the architecture schools of Greece.
Work in Indochina
In 1921, he was appointed the head of the Indochina Architecture and Town Planning Service, based in Hanoi, the capital of French Indochina, at first charged with planning the hill station of Da Lat in Annam, Vietnam's middle province. He participated in the planning new districts or urban improvements of several other cities in the region, including Hanoi itself. He also designed a number of prominent buildings, including the eclectically styled Martyr's Church, popularly known as the Cửa Bắc Church, in central Hanoi in the late 1920s (completed c1931), but he is particularly noted for a series of government buildings that worked to incorporate elements of vernacular design from French Indochina into modern structures. They include :
- Hanoi University of Pharmacy, originally the Hanoi Medical University, built 1926.
- Ministry of Foreign Affairs, originally built as the Indochina Ministry of Finance, 1924–28.
- National Museum of Vietnamese History, originally the French School of the Far East, built 1926–31, and intended to house the archeological collections of the school.
- Lê Hồng Phong High School, originally Lycee Petrus Ký, District 5, Hồ Chí Minh City, 1925–28.
- Hotel Le Royal, Phnom Penh, Cambodia, proposed 1924, opened 1929 (with Jean Desbois).
In 1930, he presented a project for the building of a university in Salonika, and in 1931 he returned to Paris, where he died at the age of 58 two years later.
- Amygdalou, Kalliopi (2014-10-15). "Building the Nation at the Crossroads of 'East' and 'West': Ernest Hébrard and Henri Prost in the near East". Opticon1826 (16): 15.
- "Diocletian". Barbarism and Civilization. Retrieved 2019-11-12.
- "Konstantinos Biris (1899-1980)". neohellenic architecture archives. Benaki Museum. Archived from the original on 2 April 2015. Retrieved 16 March 2015.
- Crossette, Barbara (1998). The Great Hill Stations of Asia. Boulder, CO: Westview Press. ISBN 9780813333267.
- The Vietnamese Wikipedia attributes to the design to the church priest Fr Antoine Depaulis.
- Rujivacharakul, Vimalin; Hahn, H. Hazel; Oshima, Ken Tadashi; Christensen, Peter (2013). Architecturalized Asia: Mapping a Continent through History. Hong Kong University Press. p. 178. ISBN 978-988-8208-05-0.
- "Ernest Hebrard's Indochina - a tour of the buildings of the Indochine architect". rustycompass. September 2016.
- "Foreign Ministry's building recognized as national relic site". vietnamnet.
- Nguyễn, Ha. "Foreign Ministry's building - Vietnam Travel Guide". Retrieved 2019-11-12.
- "A history of hospitality. Raffles Hotel Le Royal, Phnom Penh". Raffles Hotel Le Royal.
- "Diocletian's Palace in Split in the Monographs of George Niemann and Ernest Hébrard" (PDF). Institute of Art History, Zagreb, Croatia.