What if Philip the Fair does not Destroy the Templar knights

Not really. The Templars may have been ahead of the norm, but so were the northern Italian city-states.

OK. Would it make a difference to the development of the Catholic church if one of its religious orders continues to play that role instead of northern Italian city-states? Again, I don't know, but it seems like that should play out significantly.
 
OK. Would it make a difference to the development of the Catholic church if one of its religious orders continues to play that role instead of northern Italian city-states? Again, I don't know, but it seems like that should play out significantly.

I don't think so. Especially since it won't be/wasn't "instead of', but at most, "as well as".
 
One knock on effect might be that the Knights of St. John are in worse financial shape because part of the Bull that Clement issued gave the Knights Hospitallitar the holdings of the Templars. The Hospitallitars had recently invaded Rhodes and were very much in debt. Despite the fact that Philip occupied the French holdings of the Templars it seems like the Hospitallitars did profit quite a bit allowing them to stay in Rhodes.
 
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