What did/does the war-era Hanoi Communist Party HQ look like?

I was remembering the book Flight of the Intruder the other day, and it’s mention of the Hanoi Communist Party Headquarters, circa the late 60s. (I forget the exact year.) I don’t have the book handy, but I seem to recall it saying that said Party HQ had some kind of stone work on it’s exterior walls.

However, I haven’t had much luck finding many photos of this building. I’ve found one that looks fairly modern, and one other picture that looks like what was described in the book, but little other information.

So, I ask you…was the description of the Hanoi Party HQ in Flight of the Intruder accurate, and if so, is there anywhere I could find some more details information/pictures of it?

I think I’m allowed one “bump,” right? Just one?