Niccolo' B.
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Both a great tourist attraction and a fully functioning Catholic church (mass is celebrated daily), this is the main cathedral in the city of Salta. Not old, for European standards, it was built in the mid 1800s, it still boasts a richly decorated interior full of altars and religious art (paintings, statues and a wonderfully fresco painted ceiling). The cloister next door is small and not breathtaking, but still worth to see when visiting the cathedral.