It is for sure wise to say that Arbus' recent history has been strongly characterised by the mine of Ingurtosu that, as tradition has it, was discovered by an Arbusian smith. Ingurtosu mine history is clearly importantly linked with Lord Thomas Allnutt Brassey, a noble English man who owned a company active in the industrial field, "Petrusola", that later on allowed for the construction, in 1900, of the washing plant in Naracauli, that would then be named after him, after having entered, in 1896, the Sardinian Mining Association. In 1914 he became the president of the mine in Ingurtosu and in the following years he funded many different buildings within the hamlet of Ingurtosu itself, such as the Church of Saint Barbara, whose construction started in 1914, that was eventually inaugurated on 21 May 1916. After his election, like all the other directors of the mine did and would do, he lived, during his term and frequent visits in Sardinia, in the Direction Palace of Ingurtosu, usually referred to by locals as "The Castle" for its peculiar characteristics. It was indeed engineered by Eng. J.G. Bornemann, German engineer and former president of the "Sociétè civile des mines d'Ingurtosu et Gennamari", who also oversaw its construction that had already ended before 1870, after Eng. Viktor Bornemann, who would become the director of the mine between 1884 and 1894, had taken over as responsible engineer for the project. Having been mainly engineered by Germans, the building has been artistically influenced by Northern European architectural traditions and, as a result, its peculiar characteristics strongly resemble the ones of Wartburg Castle in Germany, that had for sure inspired Eng. Bornemann who was indeed born in Eisenach, where the above-mentioned castle is found.