Kinda offtopic now, and not sure if this should go here or in the thread of wonders (also, it might have been already discussed in the past). But... I've been thinking about Carthage and Lighthouses recently. Carthage is the only civ that gets a free building since the beginning of every game, in every city. And while this is strong and maybe also thematic, it creates a weird antisynergy with the Great Lighthouse.
I don't know if this is intended or not. But having a normal Lighthouse already built in every city, makes building the GL less appealing. Which is a shame, if we take into account that as Carthage you'll want most, if not all of your cities, to be coastal, and also the UU of Carthage with the Reconaissance promotions and how it'd benefit them. So... currently Carthage is a very coastal oriented civ that finds GL somewhat less appealing. How about giving something to the GL if you already had a Lighthouse in the city?
I know, there are many more wonders which give free buildings, and that could make a precedent. But, again, Carthage is the only civ that can't do "anything" about it. I mean, yeah, you could always destroy the first free lighthouse for a bit of money before the new one is constructed. But... I don't know. That seems a bad alternative to me.