Biondo Flavio (lat. Blondus Flavius; b. 1392, Forli ‒ d. 1463, Rome) was a curial notary and papal secretary, early Renaissance antiquarian and historian, whose works significantly influenced the development of the aforementioned and some of the other humanities. His most significant writings include: a treatise on the nature of Latin and the development of Italian language De verbis Romanae locutionis (On the Words of the Roman Speech, 1435); Historiarum ab inclinatione Romanorum imperii decades (Decades of History from the Deterioration of the Roman Empire, 1453), the first review of the history of the Apennine Peninsula from the year 412 to 1441, that is, to the author's time; and Italia illustrata (Italy Illuminated, ca. 1455), a geographical and historical analysis of eighteen Italian provinces. Biondo's works, that are indispensable for the development and history of antiquarian studies, include: Roma triumphans (Rome in Triumph, 1459), a depiction of public and private life in ancient Rome, which the author wanted to set as a model for modern reform of administrative and military institutions; and Roma instaurata (Rome Restored, 1446), a detailed reconstruction of the topography of the ancient metropolis and its most significant monuments, as well as some of the later Christian ones. The latter work ends the medieval scholarly approach to ancient material antiquities, and begins a new, modern phase of antiquarian studies. Therefore, that writing is the focal point of this master's thesis. This humanist was a key figure in formulating Renaissance antiquarian discourse and systematizing antiquarian studies as a historical discipline which significantly influenced almost every aspect of Renaissance culture, as well as the evolution of interdisciplinarity in the domain of cultural history. The aim of this master's thesis is to analyze the various elements of Renaissance antiquarianism and its pivotal work ‒ Biondo's Roma instaurata. Its origin and interaction with other writings of the author's opus will be studied from different points of view, as well as with the contemporary works of other Renaissance antiquarian scholars. An overview of all Renaissance editions of this work will also be provided, alongside an interpretation of the few preserved copies of the second edition which are stored in the Manuscripts and Old Books Collection (Rara) of the National and University Library in Zagreb and are very significant for Croatian culture, because they were printed in Verona in 1481 by the most important Croatian incunabula printer Dobrić Dobrićević (ital. Bonino de Bonini; lat. Boninus de Boninis). Likewise, the intention is to review the most notable earlier works in which antiquarian interest in Roman ruins can be detected, as well as some of the later comprehensive writings of Renaissance antiquaries, with always taking into account the context of continuous historical changes. Possible common motives, different concepts of the aforementioned works and general logic of their development will be considered. Further intention is to confront selected aspects of Renaissance antiquarianism with contemporary comprehensions and criticisms of this discipline and then try to reconcile their seemingly incompatible philosophies. Finally, an attempt will be made to discover interdisciplinary components of Biondo's antiquarian writing and of his entire oeuvre, especially those concerning history of art and Latin philology. This master's thesis will also be accompanied by the most comprehensive Croatian translation of selected passages of Roma instaurata hitherto, as well as relevant references and pictorial material.