Plaçage was a recognized extralegal system in which white French and Spanish and later Creole men entered into the equivalent of common-law marriages with women of African, Indian and white (European) Creole descent. The term comes from the French placer meaning "to place with". The women were not legally recognized as wives but were known as placées; their relationships were recognized among the free people of color as mariages de la main gauche or left-handed marriages. Many were often quarteronnes or quadroons, the offspring of a European and a mulatto, but plaçage did occur between whites and mulattoes and blacks. The system flourished throughout the French and Spanish colonial periods and apparently reached its zenith during the latter, between 1769 and 1803. It was not limited to Louisiana, but also flourished in the cities of Natchez and Biloxi, Mississippi; Mobile, Alabama; St. Augustine and Pensacola, Florida; as well as Saint-Domingue (present-day Haiti). Plaçage, however, drew most of its fame, and notoriety, from its open application in New Orleans. Despite the prevalence of interracial encounters in the colony, not all Creole women of color were or became placées.

Un revêtement a pour but d'améliorer les propriétés de surface d'un objet. Par exemple, les revêtements peuvent servir pour préserver ou accroître l'apparence, l'adhésion, la résistance à la corrosion, la mouillabilité ou ajuster les propriétés de surface de l'objet considéré face aux contraintes mécaniques et aux différents éléments de l environnement extérieur (ultraviolets, eau, oxydation(corrosion), température, moisissures…).

Пласаж ( — размещение) — общепризнанная негласная система культурных взглядов и норм, которой подчинялись отношения между мужчинами и женщинами в патриархальных колониальных сообществах Новой Франции.