I am not sure if Philadelphia being a World Heritage City can help with Amazon; but it is something interesting to bounce around which is why I brought it up and according to the requirements and inner workings money can be involved.
As far as Philadelphia being a World Heritage City; I'll leave that argument to them; they have us on their website; they know the requirements more then any of us down on here probably (unless we're privately involved which I won't divulge.) The Organization of World Heritage Cities deals with the topic very good.
As far as Amazon with respect to the topic; Mr. Bezos thinks global minded I think so he would know probably; city leaders would probably share it with him as a marketing tool especially when the area is being marketed by things like the World Trade Organization it also comes up.
I encourage everyone to check this out; look at it; see that Philadelphia, San Antonio, and I think Quebec are consider World Heritage cities for what its worth and even though this doesn't come up often in typical conversation; one thing that does come up is the topic of money. Money brings skyscrapers and money brings jobs; so if they are offering money to pull this off then hey roll with it if it helps right folks!
https://www.ovpm.org/
I'm mostly looking at the money aspect; sometimes you have to use what works because if we market this; bring more tourists; that plays into Amazon's hands pretty good because they want a global range and what better way to do it then to put a location in a city that can draw people globally; especially when people visit globally plus there may be other benefits which is what I'm really getting at. Look at these sites and tell me what you think.
https://whc.unesco.org/en/funding/
https://www.bizjournals.com/philadel...ity-money.html