The aim of the thesis is to better understand the social structures on the territory of the Triune Kingdom (The Kingdom of Croatia, Dalmatia and Slavonia) in the 18th century. The research focuses on the private life, military and public service career and art commissions of Krsto Oršić II of Slavetić (Xtophori, Christophori Josephi; Gornja Stubica, 1718–Zagreb, 19 February 1782), his wife Josipa (Jozefa) Oršić née Zichy de Zich et Vásonkeö (Budim, 1723–Gornja Bistra, 6 May 1778) and their sons Adam (Adamus Ludovicus Franciscus Xaverius Ignatius Joannes Nepomucenus, 1748–1820), Ivan Nepomuk (Joannes Nepomucenus Josephus Bernardus Vincentius Ferrosius, 1753–1817) and Franjo Ksaver (Franciscus Xaverius Nicolaus Antonius Joannes, 1758–1807). The research, applying historical and art historical methods, has been conducted on the comparative reading and analysis of the archival documents from the Croatian, Hungarian and Austrian state and church archives. Some artworks are preserved in situ in family castles in Gornja Bistra, Gornja Stubica, Jakovlje and Slavetić; chapels of St Joseph in Gornja Bistra and St Francis Xavier in Gornja Stubica castle; parish churches of St Anthony (the Abbot) in Slavetić, St George (the Martyr) in Gornja Stubica and St Nicholas in Poljanica Bistranska. The relevant paintings are kept in the Croatian History Museum and the Zagreb City Museum. Both the comparative artworks and the indispensable secondary sources have been studied in the specialized libraries in Ljubljana, Budapest and Vienna. In order to recreate ‘the image of the nobleman’ (imago nobilis), and consequently to better understand Croatian nobility in its entirety, the thesis first gives insight into the life of Krsto Oršić II and his closest family. What follows is the research on the role and development of a narrative of the Oršić family, who are purportedly originating from the old noble tribes of Croatia. The thesis also examines the noble family's art commissions as a tool for the affirmation of their privileged status and the mediation of specific political, ideological and religious beliefs and interests. Their heraldry, commissioned architecture (both profane and sacred) and individual artworks have been analyzed and contextualized as means of (re)presentation used to enhance and reinforce their noble status. Krsto II Oršić of Slavetić, who was the eldest son (other siblings