Hippolyte Jean Blanc (18 August 1844 – 17 March 1917) was a Scottish architect. Best known for his church buildings in the Gothic revival style, Blanc was also a keen antiquarian who oversaw meticulously researched restoration projects.
Hippolyte Blanc was born at 37 North Frederick Street in Edinburgh, third son of four children, to French parents, who ran a business on George Street importing and manufacturing ladies shoes. His father, Victor Jacques Blanc, was from Privas in the Ardèche area of France. He met his mother, Sarah or Sartia Bauress, whilst living in Dublin and moved to Edinburgh around 1840. Their firm "Madame Blanc et Fils" was at 68 George Street immediately opposite a house they moved to later in Hippolyte's life at 69 George Street.
Blanc attended George Heriot's School, winning the dux medal in 1859, and was then articled to the architect David Rhind. While working for Rhind, he attended classes at the School of Art and Design, where he met Thomas Ross, and became interested in medieval architecture. In 1864, after completing his articles, he joined the Government Office of Works under Robert Matheson, where he became a senior draughtsman in 1869. He married Elizabeth Shield on 21 August 1873, and they moved to 12 St Vincent Street. They later moved to the Grange area in south Edinburgh: first to 2 Thirlestane Road and finally to 17 Strathearn Place.
For much of his career Blanc's office was at 40 Frederick Street, extremely close to his parental home and their shop. In 1901 the office moved to 1 Rutland Square.
From the early 1870s, Blanc began to undertake private commissions. In 1875, he won his first architectural competition, for Christ Church, Morningside, and the following year won a second, for Mayfield Free Church. He left the Office of Works in 1878 to concentrate on his increasing workload, and by 1887 he had taken on a partner, James Gordon.