Karl Ludwig, Count of Ficquelmont was an Austrian aristocrat, statesman and Field marshal of the Austrian Imperial army of French noble origin.

The House of Clary und Aldringen, also known as Clary-Aldringen, is one of the most prominent Austro-Hungarian princely families. Originally from Friuli, Northern Italy, one branch of the family moved to the County of Tyrol around 1500 and to the Kingdom of Bohemia around 1600, where it became one of the leading families of the Bohemian nobility. It produced several notable Austro-Hungarian statesmen, military officers and diplomats.