Originally from Burgos in Habsburg Spain, Salamanca in 1524 for his services had received the County of Ortenburg in the Imperial Duchy of Carinthia.
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In 1524 the comital title passed to Gabriel von Salamanca, who had his new residence, Porcia castle built in the nearby town of Spittal an der Drau.
He retired to Carinthia and took his residence at Spittal an der Drau, where he had a luxuriant Renaissance palace built by Italian architects from 1533, today known as Schloss Porcia.