The Ficquelmonts were also instrumental in founding and funding several Lorrainer religious institutions such as the Holy Cross College of Nancy, the Cathedral of Metz and the abbeys of Remiremont and Flavigny.

Some Ficquelmonts who had followed Emperor Francis of Lorraine to the Imperial Court and therefore already established themselves in Austria, chose to settle in Austrian territory.

Of that tight branch are Reichsgraf Charles de Ficquelmont,[5] Great-chamberlain of Francis I, Holy Roman Emperor, colonel of HIM's cuirassiers commanding the imperial guard's cavalry and his son, Reichsgraf Jacques-Charles de Ficquelmont,[5] colonel of the guard and Great-chamberlain of Francis I, Holy Roman Emperor, commanding the cavalry regiment of Kalchreuth then of Thun.

Part of the French Ficquelmonts chose to emigrate to Austria where the family had kept close ties (for instance, Charles de Ficquelmont (1724–1792), had followed Francis I of Lorraine, Holy Roman Emperor at the Imperial Court of Vienna when he was 12 and had stayed there ever since serving as colonel of the Imperial guard and (from 1764) Great-chamberlain of Emperors Francis I and Joseph II[7]) various estates and strong supports all the way to the Habsburgs themselves (for instance, Archduchess Marie-Christine personally placed count Joseph de Ficquelmont in Emperor Leopold II's care in a letter dated from January 30, 1792[8]).

It is best represented by: He married countess Dorothea von Tiesenhausen, granddaughter of Prince Mikhail Kutuzov, Masrshall of the Russian army and hero of the Napoleonic wars.