And last, but by no means least, is the oldest building in Barcelona Sant Pau del Camp
, located in the old town neighbourhood of Raval. This church is the complete opposite of what you might imagine, exactly the same on the inside as the outside stone. No icons, no gold, bare lighting and no heating. The cloister has that smell you can only associate with extremely old buildings and it is so old in fact, that historians struggle to date the church. A real hidden gem, which doesn't always make people's to-do list but definitely should.