It can't be too long before Trump either dies from eating too many Big Macs, or one of the approximately 8 billion people people who wish him dead finally get to him.

That leaves the question: What to do with the carcass?

I suggest constructing the "Donald J Trump Mausoleum and Public Toilet". A big public toilet building where part of the generated sewage is directed to the grave underneath it.

I imagine an exterior of Roman pillars made from concrete, completely gilded with brass.