Alhambra (1)
Colosseum (8)
Forbidden City (12)
Kilwa Kisiwani (9)
Temple of Artemis (16)
Terracotta Army (10)
Colosseum (7+1): It keeps your infrastructure from sagging under the weight of increased Amenity demands before late-game Amenity sources are unlocked. The luxuries that your core cities no longer need because they're covered under Colosseum can now be distributed to your occupied cities, thereby reducing Loyalty problems.
Alhambra (4-3): Of the remaining wonders, this is the one I'm least inclined to build myself.
Colosseum (8)
Forbidden City (12)
Kilwa Kisiwani (9)
Temple of Artemis (16)
Terracotta Army (10)
Colosseum (7+1): It keeps your infrastructure from sagging under the weight of increased Amenity demands before late-game Amenity sources are unlocked. The luxuries that your core cities no longer need because they're covered under Colosseum can now be distributed to your occupied cities, thereby reducing Loyalty problems.
Alhambra (4-3): Of the remaining wonders, this is the one I'm least inclined to build myself.