Portrait de Louis Guiguer de Prangins

Painted in 1713 and held by the Swiss National Museum at the Castle of Prangins, this portrait of Louis Guiguer de Prangins—a Geneva-based banker and financier who purchased the Castle of Prangins on Lake Geneva—documents Largillière's connections to the world of Geneva's Protestant financial elite. The Guiguer family were prominent in Swiss and French financial circles, and Louis Guiguer's purchase of Prangins reflected his considerable wealth and social ambitions. The Swiss National Museum's choice to hold this portrait in the same castle that was once Guiguer's property creates an unusual historical continuity between the portrait and its setting. At 1713, Largillière was at the height of his powers, and a portrait for a wealthy Swiss financier represents the cosmopolitan reach of his practice across Protestant and Catholic, French and Swiss patronage networks.

The portrait of a wealthy banker, unlike a noble or ecclesiastical commission, would emphasise professional dignity and substantial wealth rather than dynastic lineage or spiritual authority. Largillière's treatment would have focused on the combination of financial confidence and social respectability that characterised the rising Protestant banking families of the early eighteenth century. The costume—rich but not extravagantly martial—would have been handled with the same fabric precision he brought to aristocratic dress.