Croatia’s best Roman architectural remains can be found in Split and Pula: architecturally outstanding complex of Diocletian’s Palace in Split and the extremely well preserved amphitheater in Pula – Istria. Other significant Roman sites include Zadar and Salona, while numerous smaller finds are exhibited at the archaeological museum in Split. In Istria, the important architectural site is in Porec – the Euphrasian Basilica.

The city center of Zagreb is dominated by the nineteenth-century architecture of the Austro-Hungarian Habsburg Empire. Buildings such as the current home of the Archaeological Museum are part of the monumental aspect of the city in this period but also show intricate details such as the stairwell decoration within the museum. Austro-Hungarians left a great impact on the architecture of Opatija which can be seen in one of the oldest and most beautiful buildings in Opatija, Villa Angiolina.

Town of Hvar is a well-preserved medieval city that has a particularly fine sixteenth century Renaissance cathedral, the Cathedral of St Stephen. The structural characteristics of the Cathedral of St James in Sibenik make it a unique and outstanding building in which Gothic and Renaissance forms have been successfully blended. The Renaissance fort of the Ratkay family in Veliki Tabor from the 16th century has mixed features of Gothic architecture (high roofs) and Renaissance (cluster and round towers.