Here is one of the many silent witnesses of Barcelona's history, resisting the passing of time, worn out by the action of so many hands that are here no more, bitten by its feline companion for ages, casting its monotonous call: knock...knock...knock. There are many of these in the city. Here are some others I published in the past: Lion Head Door Knocker, Rusty Door Knocker, Vandalized Door Knocker and Knocker on Chocolate Color Door.
