Also, does Endowment have some physical presence in the book similar to Ruin=Atium, etc?
Endowment does have such a thing, but it does not appear onscreen in the novel Warbreaker .
If you are viewing this on github.io, you can see that this site is open source. Please do not try to improve this page. It is auto-generated by a python script. If you have suggestions for improvements, please start a discussion on the github repo or the Discord.