Carlenburg, officialy the Principality of Carlenburg (Portuguese: Principado de Carlenburgo) is the one of the six principalities and seven federative units of the Kingdom of Ebenthal. The a federative unit lanlocked by the Brazilian city of Magé. It is ruled as an absolute monarchy by Prince Reinaldo I, King Arthur II of Ebenthal's stepfather, and it host three cities: the homonimous capital city of Carlenburg and the cities of Teffé and Saint Arnald. With a total population of 18 inhabitants, it is the country's third most populous federative unit. It is also in crown union with the Principality of Alvorada.