this is such a beautifullt rendered piece; this is how i will forever imagine Nargothrond now. The only blight is the unfortunate presence of a winged dragon. It is explicit in The Silmarillion that the winged fire drakes were not revealed until the last day of The War of Wrath. Because its such an awesome work, that particular embelishment is quite glaring.
Very nice painting, I really like it, but I wonder what does it have to do with the fall of Nargothrond? The hidden kingdom of Finrod built in caves, with hidden gate, in the last days easy to discover because of a bridge over a river. Not that broad river, I expect. There were no ships and no buildings atop the mountain as I recall. Also no flying dragons at these times, they came later with the War of Wrath. In the fall of Nargothrond we've got one dragon - Glaurung, the father of dragons, he doesn't have wings. So, great painting but to some alternative version of the story.
Dwarves used to live deep in mountains, I would rather turn it into Numenor, maybe the fall of Numenor? Or a fight with pirates of Umbar? Hard to find a sea battle in the Silmarillion for the enemy never used ships - Ulmo was in the water and made use of water impossible for any evil creatures. It doesn't have to be in the book at all, the painting is great on it's own
if you like Napoleonic paintings (as I do) and can make your way to the Manchester, there's an amazing painting by Adolphe Yvon, of Marshal Ney leading the retreat from Moscow in 1812. Its hanging here [link]
this is the biggest colour image of it I could find on Google [link]
a bigger black and white detail here [link])_-_Marshall_Ney_at_retreat_in_Russia.jpg