He married in 1847 the countess Clam-Martinic, but there was no issue of the marriage.
Charles's ambition aimed at wider fields, and when Margaret, countess of Flanders, asked help of the French court against the German king William of Holland, by whom she had been defeated, he gladly accepted her offer of the county of; Hainaut in exchange for his assistance (1253); this arrangement was, however, rescinded by Louis of France, who returned from captivity in 1254, and Charles gave up Hainaut for an immense sum of money.
The countess tried to frown, but could not.
In his singlehanded duel with the strength of Germany, Gregory received material assistance from the Countess Matilda of Tuscany.
The church of the Holy Trinity, mainly Perpendicular, was also partly demolished during the Civil War, but was restored by the countess of Pembroke.