Pierre-Louis Pierson (1822-1913) was photographer at the French Imperial court. Among his works were portraits of French legislators (many of which can be seen here). He perhaps best known for the hundreds of photos he took (over the course of decades) of the Comtesse di Castiglione, Virginia Oldoini (more about her here). Most of the photos in this set are of her.
Comtesse de Castiglione (1867)
Album des députés au Corps législatif entre 1852-1857 - Hallez-Claparède
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione (1895)
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione
Comtesse de Castiglione
L’Ecstase (1860s)
La Comtesse Reclining in Chinese Robe (1860s)
L'accoudée