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Official seal of Blauberga
Eo nomine
By the name
Country Marienbourg
Historic countriesBrazil
H. of Carvalho3 March 1886
Sovereignity26 December 2022
Marien. Capital9 January 2023
Founded byAna Carvalho
 • TypeExecutive-led devolved administration
 • PrefectAntónio Carvalho
 • Total0.57 km2 (0.22 sq mi)
 • Water0 km2 (0 sq mi)  0%%
1,196 m (3,924 ft)
 • Total6 (permanent)
 • Rank1st
Time zoneUTC−3
Postal Code (CEP)
Area code+55 35
HDI (2023)0.888 very high (1st)

Blauberga (Portuguese pronunciation: [blˌa͡ʊbˈɛɾəɡɐ]) is the capital and most populous city[a] of Marienbourg, located at the urban area of the country, southeast of Pomerade. The municipality has 0.57 km² and 6 permanent residents divided into three burgs, or neighborhoods, entirely surrounded by the Brazilian city of Poços de Caldas. Blauberga is administered through an executive-led devolved government by an elected Prefect and is represented in the Ducal Diet by five parliamentarians, four democratically elected and one appointed by the sovereign Duke.

Prior to the Portuguese colonization in South America, the territory corresponding to Blauberga was presumably inhabited by the Aimoré indigenous tribe. With the beginning of colonization, the indigenous people were enslaved to work in the gold mines in Captaincy of Minas Gerais. Following the end of the Brazilian gold rush, frustrated miners settled in the region that was privately owned by a Portuguese fidalgo and later, after the independence of Brazil, became the municipality of Poços de Caldas, in which Ana Carvalho, a descendant of Minas Gerais miners, settled in 1886. After leaving town, however, her descendants eventually returned, becoming businessmen and farmers. In 2022, her great-great-grandson Arthur van der Bruyn, together with two of her grandsons, proclaimed the sovereignty of their properties in Poços de Caldas and founded the Duchy of Marienbourg, converting the urban properties into the municipality of Blauberga and national capital.

Blauberga is a highly developed city and is the national financial and administrative hub, almost equals Orangenbäume in its cultural output. The municipality is home to the country's main public institutions such as the Medical Treatment Support Service and the MARIA as well as companies such as the Hotel d'Oeste, the only hotel in Marienbourg, and the Agricultural Company Carvalho Brothers.[b]


The name "Blauberga" is a combination of the Flemish word blau (blue) and the German toponymy berg (mountain), but spoken as in Mirandese berga (which is equal in European Portuguese, but different from the Brazilian Portuguese bergue). The name is a reference to Monte Azul (English: blue mountain), a neighborhood in the Brazilian city of Belo Horizonte where Ana Carvalho went to live after leaving Poços de Caldas and where her children and grandchildren were born, including the brothers António and Edson Carvalho, the proprietors of the estates and lands that form Marienbourg, as well as their late sister Maria III, Princess of Marienbourg, grandmother of the current reigning Duke Arthur V. The name was officialiy adopted on 29 November 2023 substituting the former original name of Blauerhimmel which was considered too foreign and difficult to spell by the town inhabitants.

The choice of languages whose individual words, together, form the name of the municipality are a reference to the origin of the House of Bruyn-Carvalho, Marienbourg's ducal house, a cadet branch of the House of Bruyn, which has Flemish origins, while the Carvalho family has Jewish-Portuguese origins through the Mirandese people.


  1. Both the municipalities of Blauberga and Pomerade have the same resident population, however due to Blauberga's higher turnover number and its status as the capital, the city is officially counted as the most populous in the country.
  2. Companhia Agrícola Irmãos Carvalho in Portuguese