I found O Comercial when I was making a visit to the Palace of the Bolsa. It is the best-kept secret in the city. It is in the Palace and has impressive architecture. The cuisine is modern Portuguese and it has an interesting ambient. A tasting menu made up of 7 plates is 25 Euros and also has a Day menu with 3 plates and a glass of wine for 13 Euros. The perfect ending to our visit to Porto!