O kraljevstvu Dalmacije i Hrvatske

The book has six books: 1–2. The ancient period of Dalmatia and Pannonia, the Illyrians, Roman rule, the arrival of the Slavs and Croats; 3–4. The Croatian state from the 7th to the 12th century – Tomislav, the national kings, the Croatian-Hungarian union in 1102; 5. Dalmatia under the Venetians and the Croatian coastal cities; 6. Church history, dioceses, monasteries, the Glagolitic script.

Lučić uses sources systematically for the first time: documents, inscriptions, manuscripts, archives of Venice, Zadar, Split and Dubrovnik. He rejects legends (e.g. about the Czech origin of the Croats), proves the autochthonous nature of the Croatian name and statehood and the continuity since the 7th century. His conclusion that Croatia entered into a personal union with Hungary in 1102 while retaining its state identity, which became the basis for later Croatian arguments on state law, is particularly important.

The work was written in a Baroque spirit, but with incredible critical acuity for the 17th century. For this reason, he is called the "father of Croatian historiography." The book is still required reading today, as most of Lučić's theses have remained unchallenged.