Louis Diémer photographed by Étienne Carjat sometime in the 1860's.  At the time of the Exposition Universelle  in 1889, Diémer would have been more than 20 years older than he was in this photograph.  Diémer gave concerts of harpsichord music on various antique and modern instruments which were made to celebrate the 100th anniversary of the French Revolution which happened in 1779.