If we refer to each of the seven wonders by the first letter of its name which of these is correct in terms of the order they are built

If we refer to each of the seven wonders by the first letter of its name which of these is correct in terms of the order they are built : 
P,H,T,S,M,C,L
Great Pyramid of Giza 
Hanging Gardens of Babylon 
Temple of Artemis at Ephesus 
Statue of Zeus at Olympia 
Mausoleum at Halicarnassus
Colossus of Rhodes
Lighthouse of Alexandria.  

  the domino theory states that  if one country in a region came under the influence of communism, then the surrounding countries would follow in a  domino  effect.