The rulesrules for the Wonder Pack say:
If multiple players take cards from the discard pile during a given turn, the resolution order is the following: Halikarnassos, The Great Wall, Manneken Pis, Salomon and finally, Courtesan’s Guild
Let’s say Alice plays this ability from Halikarnassos and Bob plays it from The Great Wall.
Alice chooses a card from the discard pile. Does she have to put it in play before Bob chooses a card? Or do they put their cards in play simultaneously?