The Cathedral of St. Domnius, located within Diocletian’s Palace, is one of the most striking landmarks in Split and holds the title of the oldest Catholic cathedral in the world still in use in its original structure. Originally built as Emperor Diocletian’s mausoleum in the 4th century, it was later converted into a Christian cathedral, giving it a fascinating blend of Roman and medieval architecture. For visitors, it’s not just the religious significance but the history and design that make this a must-see.

The cathedral’s bell tower is a real highlight. Standing 57 meters tall, it’s a classic part of Split’s skyline and offers one of the best views in the city. Climbing the narrow staircase might be a bit of a challenge, but the effort pays off once you reach the top and take in the stunning 360-degree view of Split, the surrounding mountains, and the Adriatic Sea. This is a great spot to snap some photos and appreciate the beauty of the city from above.

Inside the cathedral, you’ll find richly decorated altars, intricate carvings, and a collection of religious art that reflects centuries of worship and devotion. The octagonal shape of the structure is unusual for a cathedral, a nod to its origins as a Roman mausoleum. Visitors can also see the wooden doors created by master craftsman Andrija Buvina, which date back to the 13th century and depict scenes from the life of Christ. These doors are considered one of the finest examples of medieval woodcarving in the region.

Another point of interest is the crypt, located beneath the cathedral, which adds to the sense of history and mystery. It’s a small but atmospheric space dedicated to St. Lucy, and it’s worth a quick visit to round out your experience.

Right next to the cathedral is the Treasury, which houses an impressive collection of religious relics, manuscripts, and artifacts. Even if you’re not deeply into religious history, it’s fascinating to see the craftsmanship and importance placed on these items throughout the centuries.

Whether you’re interested in its historical roots, religious significance, or just the beauty of its architecture, the Cathedral of St. Domnius is a key part of any visit to Split. It’s a place where ancient Roman history and Christian tradition meet, making it both a spiritual and cultural experience.