Louis-François Cassas (June 3, 1756 – November 1, 1827) was a French landscape painter, sculptor, architect, archaeologist and antiquary born at Azay-le-Ferron, in the Indre Department of France.

[1] As the godson of the Marquis Louis-François de Gallifet, owner of the Château d'Azay-le-Ferron, where Cassas was born,[2] his artistic education was very eclectic.

A commission by "une societe d'amateurs des beaux arts" in 1782 took him from Istria to southern Dalmatia, to make a series of illustrations of the antiquities on the east Adriatic coast.

In 1973, the government of Yugoslavia paid homage to Cassas issuing a postage stamp of the city of Split from one of his 1782 etchings called Vue de Spalatro et du Lazareth.

[1] As an architect, he was occupied many years in forming a large collection of 745 architectural models of ancient monuments in cork and terracotta in almost every kind of style, from many countries and epochs.

[11] Besides his architectural and archaeological drawings and sketches, he drew numerous costumes studies, views and processions, as well as scenes from daily life, plants and animals of all sorts.