That's how I read it too. Maybe a bit presumptuous to add such a plaque right away and not, say, as a clause in a will or something – the building might be gone in five years, after all. But I didn't really read it as self aggrandizing.
In context with the content and tone of the post, it reads as self-aggrandizement—a seemingly not uncommon affectation among those who have attained notoriety in their own lifetime.
And while one might regard it as distasteful—it’s certainly tiresome, in my experience— there’s material and psychological benefits to holding that mindset (along with a variety of non-trivial downsides.)
