The Seven Great Wonders, even if its basically an Ancient Greek travel guide, represents some of Western Antiquity's greatest architectural and artistic achievements. But as my title implies, the only one still standing is the Pyramids. So assuming we can have as few butterflies as possible, how many of these can survive as long as possible, and how?
I'll list and describe:
1. Great Pyramid (Giza) -- Still exists, as much as ISIS wishes they could destroy it.
2. Hanging Gardens (Babylon) -- Likely never existed, probably was the earliest to be destroyed if it ever did exist. Likely the hardest to save (since that might very well require it to be built to begin with).
3. Temple of Artemis (Ephesus) -- Ignoring the more famous destruction by Herostratus, the rebuilt temple was destroyed by the Goths in the late 3rd century. If it survived, it would face an uncertain future in an increasingly Christian Roman Empire, but maybe it could be converted into a church like the Parthenon and enjoy a similar history instead of total destruction?
4. Statue of Zeus (Olympia) -- One hell of a statue, but it faces a lot of the same challenges as the Temple of Artemis, and actually survived long enough to face them. It needs to be converted into a church, and the statue needs to somehow survive. The building surviving is much easier than the statue surviving, of course. However, there is the off-chance that if the building survives, a nice replica may be built somewhere else in time, using the example of the Parthenon replica in Nashville, Tennessee.
5. The Colossus (Rhodes) -- It's not gonna survive standing up. Some earthquake will knock it down since it's in an earthquake zone after all. Someone needs to rebuild it with better engineering, but even that might be difficult to save it from a future earthquake. And at some point, wouldn't someone want to melt it down, be it Christians, invading Muslims, anyone?
6. Mausoleum of Mausolus (Halicarnassus) -- Very likely to survive. A less chaotic Medieval Anatolia could help the building survive, although it seems like it would need many repairs by the early modern age and be much like the Parthenon.
7. Great Lighthouse of Alexandria. -- The most likely to survive of the destroyed Wonders. Earthquakes damaged it, but it wasn't finished off until the Mamluks rebuilt the remnants into a fortress after another major earthquake. If kept repaired, and with an Egypt more or less stable from internal and external threats for most of history, the Great Lighthouse could survive, and keep its original use for most of history, even if the "modern" Lighthouse looks different than the version from Antiquity thanks to centuries of rebuilding. Perhaps the saddest loss of the Great Wonders.
Thoughts on this list? Effects on future tourism, architecture, development of nations? The Great Lighthouse could be one hell of a tourist attraction on Egypt, and possibly symbolic enough to put on the flag since the building looks so damn cool.
With as few butterflies as possible, I think we can have the Pyramids and the Great Lighthouse survive more or less intact, while the Mausoleum, Temple of Artemis, and Statue of Zeus (the building) survive but as very impressive ruins (like the Colosseum or Parthenon). The country controlling Rhodes rebuilds the Colossus to attract tourism (an OTL plan). And hell, maybe we can have whoever controls Babylon or a nearby city (Ctesiphon, Baghdad?) build a recreation of the Hanging Gardens in response to Rhodes. I wouldn't be surprised if OTL Saddam Hussein ever thought it would be a good idea to (re)build them, so why not another ruler of Mesopotamia?
Overall thoughts?