Cathedral of the Assumption of Mary

Tucked between the harbour and the Arena, Pula's cathedral is a palimpsest of two thousand years — the kind of building where you can read the whole story of the city off the walls. A 4th-century early-Christian basilica came first, laid down when Christianity was still fresh in Roman Pola; you can still see fragments of its original mosaic floor through glass panels beside the nave. Successive rebuildings after Ostrogothic and Venetian sackings gave it the sober Renaissance façade of 1707 you see today, but inside the columns are recycled Roman: some are literal spolia from the temples of the Forum, still bearing pagan inscriptions. The sarcophagus behind the main altar reputedly holds relics of the 11th-century Hungarian king Solomon, who died on pilgrimage nearby. The freestanding bell tower — visibly angular and severe — was built in the 17th century from stones quarried out of the Arena itself, one of the few times Pula was allowed to cannibalise its own amphitheatre. It's a working cathedral: morning mass is in Croatian, and choral concerts fill the nave during the summer festival season. Entry is free but discreet — this is not a museum. Come mid-morning after visiting the Arena, sit for ten quiet minutes, and look for the Roman altar stones repurposed as holy-water fonts near the entrance.