Charles, Margrave of Burgau, also known as Charles of Austria, (22 November 1560 at Křivoklát Castle in Bohemia – 30 October 1618 in Überlingen[2]), was the son of Archduke Ferdinand II of Austria and his first morganatic marriage to Philippine Welser.

Here, he recorded some successes — at the expense of his soldiers, who were hungry and unpaid; some of them deserted — and was promoted to Field Marshal.

Contemporary sources describe his magnificent court at his residence, Günzburg Castle.

In 1601, Charles married Sibylle (26 August 1557 – 1627), the daughter of Duke William of Jülich-Cleves-Berg.

This marriage remained childless, and after Charles's death, his possessions fell back to the main line of the House of Habsburg.