[Nogrod]

The lack of paintings might just come down to the fact that painting (especially painting on canvases) is mainly a renaissance art and thus ill-fitting for a story with a kind of medieval ring to it.

But weren't dwarves kind of sculptors and carvers? The gate to Moria, inside their Halls?

It's easy to see the Hobbits not being that much into painting or sculpting, or the elves to that matter... but the lack of mentions of painture or sculpture in Gondor I think is a bit odd as one would certainly think fex. Minas Tirith to be just a place filled with statues, floor-mosaics, wall paintings, painted windows...

It would be interesting to hear if someone had ideas about that.