Louis-Joseph Mondhare (1734 - 1796) was a Parisian engraver and publisher of maps, prints and optical prints. Mondhare was born in Bougy (Calvados) and moved to Paris on or before 1759.
He began publishing around 1760 under the Chez Mondhare imprint. On June 7 of 1784, his son-in-law Pierre Jean (1754-1829) joined the business and they changed their imprint to Mondhare & Jean.
The Mondhare firm maintained their office on Rue St. Jacques, at the Hôtel Saumar, a well-known location for print sellers near St. Severin. Later they relocated to 32 Rue Saint-Jean de Beauvais. The firm ceased operation around 1796. Mondhare died shortly afterward in 1799.

In the eighteenth and nineteenth centuries there were many popular specialty establishments in Paris, Augsburg and London which produced optical viewing devices and special engravings to be viewed through them. In the 18th century the "optical print" or "vue optique" came into existence, whose exaggerated converging lines were intended to produce the optical illusion of deep recession. The viewing devices for which these perspective prints were produced consisted of a lens and a mirror, this requiring the use of reversed or mirror-image pictures.