A rainy afternoon in Naples is the perfect time to visit the Naples Cathedral, also known as the Duomo di San Gennaro. This stunning cathedral is dedicated to the city's patron saint, Saint Januarius. Admire the beautiful architecture, including the Gothic-style facade and the ornate interior. Marvel at the frescoes, sculptures, and mosaics that adorn the cathedral. Don't miss the Chapel of the Treasure of San Gennaro, where the blood of the saint is preserved in glass ampoules. Take a moment to soak in the peaceful atmosphere and reflect on the centuries of history that this cathedral represents.