I would say this is a must in Porto. The church itself is amazing on the inside and nothing else looked that good after seeing this. The statues and everything in there is so detailed and so beautiful that I just loved it there even though I'm usually not interested in visiting many churches.
Also the catacombs under there had beautiful lighting and quiet music, which added so much to it that I was just amazed.
It's definitely worth the 3€ ticket!
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