Toma Splićanin - državnik i pisac (1200.-1268.): njegovo život i njegovo djelo

Šegvić provides a detailed analysis of Thomas's most famous work, Historia Salonitana, which is an invaluable source for understanding the political, social, and ecclesiastical situation in Dalmatia at the time. The author relies on Thomas's writings to reconstruct the historical context, emphasizing his role as archdeacon of the Split church and his contribution to preserving the autonomy of the city of Split.

Šegvić pays special attention to Thomas's education and travels, especially his studies of law and theology in Bologna, which significantly influenced his intellectual development. Through his analysis of Thomas's work, Šegvić also promotes the theory of the Gothic origin of the Croats, relying on Thomas's writings and interpretations.

Although some of Šegvić's interpretations are today the subject of debate, his monograph remains a fundamental work for studying the life and work of Thomas the Archdeacon. The book is written in an accessible style, bringing history closer to a wider readership, while at the same time encouraging further research and discussions on medieval Croatian history.