Galileo's half-pendant was definitely not in the Shrine of the Silver Monkey. Renegade Pancake theorized it was there at one time on his fansite, but it makes no sense for it to be there. Judging by the path Jammin John and Jennifer took, the last guard had to be in the Shrine. So if the half-pendant was in the same room as the last guard, then that would mean the kids would virtually have no time window to find it. It's true that Jammin John opens the Treasure of Anne Bonny in the back of the room, but I think he did that out of confusion since it was the first temple run ever taped. But the half-pendant most definitely had to be located somewhere else.

Likewise, I don't believe the half-pendant would be in the Dungeon for Sultan Saladin's run. The temple guards were most likely located in Cave of Sighs (confirmed by Lea's exit), Heart Room (popular choice for guards in S1), and Tomb of the Ancient Kings (last guard on path). The last guard could be in the Pirate's Cove I guess, but Season 1 was pretty unoriginal with their temple guard locations. So the half-pendant should be located BEFORE the Tomb of the Ancient Kings.
Just curious, why is Golden Cup listed as the 19th episode? It was pretty much confirmed to be Episode #2 when Nick GaS the entire show in chronological order back in 2007. I know the temple run is in a different layout, but the episode list does not go by temple run order. Here is how the first four episodes should look like:
- Episode 1: Blackbeard (There's a couple of threads that discusses the reason why it's EP1 even though the entire episode is taped in S1L5.)
- Episode 2: Golden Cup (This was most likely the 18 hour episode since it was the first episode actually produced. The entire episode is produced in S1L1, except for the temple run. The reason the temple run was postponed was most likely because of the long production schedule)
- Episode 3: Galileo
- Episode 4: Dead Man's Hand
If you want the episode list to be accurate, I highly suggest that you follow Ed's episode list on the King's Storeroom site. We know for a fact that episode list is correct because multiple channels have referred to the list. For example, when Great Seal aired on T90'sAAT, all of the TV guides listed it as 1x16. But the wiki says that Great Seal is EP14. I don't mean to sound rude, but I just wanted to point out the inaccuracy.