Louisiana (Spanish: Luisiana) was the name of an administrative district of the Viceroyalty of New Spain from 1762 to 1802 that consisted of territory west of the Mississippi River basin, plus New Orleans. Spain acquired the territory from France, who had named it La Louisiane in honor of King Louis XIV in 1682. It is sometimes known as Spanish Louisiana. The district was retroceded to France, under the terms of the Third Treaty of San Ildefonso (1800) and the Treaty of Aranjuez (1801). In 1802, King Charles IV of Spain published a royal bill on 15 October, effecting the transfer and outlining the conditions.