The Galata Tower has totally ruined the attack/plunder dynamic of the game. If you have spent 4 years getting your attack up to 1750% and you are blocked from plundering a city 1/10th the size of yours by a level 10 Galata Tower, that is totally unrealistic and, as KennyToo said, above, it makes it practically worthless to try to plunder. Not to mention, it destroys any worth the Atlantis Museum might have once had. Inno needs to nerf the defense chance of the Galata Tower based on the defender's defense value vs. the attackers attack value, or introduce some mean of offsetting the GTs chance of blocking the plunder.
Note: And I have said this before, introduce a new GB... the Trojan Horse, that would have an increasing chance of bypassing the enemies Galata Tower defenses with each level you add to it.