I saw a recommendation for this synagogue whilst browsing a Barcelona guide and am really glad I took the trouble to seek it out.
Location wise it is just a few minutes from the main square Placa de Sant Jaume (where City hall is located) - with your back to the City hall head up Carrer de Sant Honorat and then turn left after about 50 metres down a narrow side street.
From the street there is not much to see - all that is left of the original synagogue is the basement area through a low doorway and down about four narrow steps.
Entrance was EUR2.50 but this included a "tour" (its just two rooms!) from one of the museum volunteers who spent about 10 minutes talking to me about jewish history in Barcelona, the building itself and its relics -all fascinating stuff.
Although the synagogue dates back to the 3rd century and is in fact the oldest in Europe, it was only rediscovered as a synagogue about 20 years ago. As such there is little of the original building left except a few walls and keystones so dont expect anything grand!
Most of what you see in terms of artefacts has been donated by well wishers but even so is still very beautiful and there is a real sense of history here.
For the price of a cup of coffee I would certainly recommend 15 minutes here discovering one of the less well known sides of Barcelona and its history.
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