I found that the biggest common connection these structures had was religious purpose. They varied architecturally and in their ways of preservation. Some cultures rebuilt the structures altogether, others used periodic repairs as a way to bring the community together. Overall though, the original ideas and architecture has been preserved. Modernization has occurred through improvements such as electricity and making the structures more accessible to the community. Tourism and community access brings in revenue to continue to allow improvements on the structures as well as educate on cultural history. Because of this, some of the religious aspect of the structures has been lost, but not all. There is a balance of modernism and preservation of history. 

My concept map may seem a little messy but I feel that all the subjects correlate with one another. To preserve a structure you must take safety measures such as; security, ropes, certain visiting hours and a no-touch policy. To preserve you must also rebuild and touch up structures and artifacts. To modernize a structure you must have lighting, bathrooms, websites, tour guides and so on. To do all of these things it takes money. Most of these structures charge to visit the site or at least the museum. A lot of these structures host festivities and events to bring in revenue. They are also receiving funding, whether from the government or from other parties. Its a cycle, for example to keep a structure relevant and up to date it takes money, to receive that money you charge for tours.

I did find it interesting that to preserve the sacredness of the Great Mosque of Djenne, non-muslims have been banned since Vogue (in 1996) took risqué photographs inside the building.

All of these structures are working to keep up with current times.  May the work being done being pure restoration on the buildings or the sculptures, or dealing with different religions wanting to use the grounds or wanting to get rid of them.

https://www.engineeringthepast.com/872-2/