The American Cyclopædia — Courland
“ The nobility and the city population, and the higher classes generally, are of German descent, numbering about 77,000, while the peasantry and the lower classes are chiefly of Lettish origin. A provincial diet, composed exclusively of nobles, meets annually at Mitau.—Courland, having been together with Livonia Christianized and for centuries ruled by the knights sword-bearers, became a temporal hereditary duchy under Ketteler, the last grand master, about 1560, as a dependency of the Polish crown. ”
