Anna obtained a civil divorce in 1906, after he had spent about $10 million of the money given to Anna by her father upon marriage. In 1908, Anna married his cousin, Hélie de Talleyrand-Périgord, Duke of Sagan, 5th Duke of Talleyrand, and Castellane then sought an annulment from the Vatican so that he could be free to remarry in the Church. The annulment case was settled in 1924, when the highest Vatican tribunal upheld the validity of the marriage and denied the annulment.