Marshall húsið is quite new, featuring three small museum; The Living Art Museum, Kling & Bang and studio Ólafur Elíasson. You can also find a restaurant located on the first floor with a view over Reykjavík harbour. This place used to be an herring plant and you can almost still smell the fish which was quite hard to get rid off when they cleaned the place. They kept the walls raw and the rooms are open with big windows bringing nice light into the place. I think this was quite successfully done.
The house of Marshall is located on Grandagarður 20