Henri-Jacques Espérandieu (French pronunciation: [ɑ̃ʁiʒak ɛspeʁɑ̃djø]; 22 February 1829 – 11 November 1874) was a French architect who made his career in Marseille. He was responsible for some of the city's now most famous buildings, including Notre-Dame de la Garde (the "Bonne Mère"), Marseille Cathedral (the "Major") and the Palais Longchamp.
General info from Wikipedia.org