In full fig - first cousins and princes of Liechtenstein, by an unknown artist, 1630

 

Prinz Karl Eusebius von Liechtenstein at the age of nineteen.

Prinz Hartmann III von Liechtenstein at the age of seventeen.

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Karl Eusebius von Liechtenstein (11 April 1611 - 5 April 1684, Schwarz Kosteletz), second Fürst of Liechtenstein, Duke of Troppau, and Duke of Jägerndorf from 1627 to 1684, and from 1639 to 1641 Oberlandeshauptmann of Silesia. The eldest son of Fürst Karl I, his primary goal, after his accession at the age of sixteen, was the restoration and reorganization of his family, which had been heavily burdened by the Thirty Years' War and damages claimed against his father's expropriations of other landholder's estates. In spite of this, he invested considerable sums in cultural goods, stating, "The money is only to leave beautiful monuments to eternal and immortal memory.” To that end, he laid the foundation for the Liechtenstein art collections. Furthermore, the prince was a brilliant horse breeder, a passionate gardener, and a builder who wrote his own architectural theory treatise which remains an important source for the architectural understanding of noble builders of the seventeenth century. He and his wife Johanna Beatrix von Dietrichstein-Nikolsburg had nine children. Their youngest child and only surviving son, Johann Adam Andreas (1657 - 1712), succeeded his father as third fürst, but since none of his own sons survived him, his successor as head of the family was his cousin Anton Florian from the younger, "Gundakarian" line of the House of Liechtenstein.

Hartmann III von Liechtenstein (9 February 1613, Vienna - 11 February 1686, Wilfersdorf, Mistelbach, Lower Austria), Prince of Liechtenstein, the common ancestor of the current princely house of Liechtenstein. He was the eldest son of Prince Gundaker, younger brother of Fürst Karl I of Liechtenstein. When his uncle Karl's male line died out in 1712, his own son, Anton Florian, became head of the family and first sovereign prince of Liechtenstein.