After some responses to Artefact Three, I realised that the way I had gone about it was not going to get me good feedback. So I’ve redone it to look at what makes a location more convincing.
I’ve taken the same temple but created two sets of drawings with the same colour palette, with the only difference being the amount of detail.
Which one of these drawings is the more convincing location? Give reasons why and be as detailed as you can. Is there anything that can be done to make it more believable?
Additionally, sort of place do you think this is? What do you think happened here? How long ago do you think it happened?
Dragons and Uni 
First of all let me say that the addition of the bottom drawings (from a different perspective) helped a great deal.
– Which one of these drawings is the more convincing location?
The one on the right. Looking at the drawing on the left, everything seems to be in pristine condition apart from the fact thatprts of the wall, balcony and pillars are missing (they kind of look like they were cleanly cut off by some kind of alien laser device thingie). The second one looks much more worn out, with walls and stuff that look more like something broke off at some kind of impact. Another thing that adds to the believability is the floor board being uneven and the pillar bottom of the right front pillar missing a piece (which is a subtle but very convincing effect). The magic is in the details, really.
– Is there anything that can be done to make it more believable?
One thing I’m really missing is some rubble: obviously a large part of the wall fell down, but apart from the floor being a bit cracked there’s no debris of any kind. This really hurts the believability. (Unless the building is a monument, cleaned up by much later generations, in which case the lack of rubble would make sense.)
= Additionally, sort of place do you think this is? What do you think happened here? How long ago do you think it happened?
At this point if I had to guess the place is supposed to be a religious building (you said it was a temple, but I was thinking more of a synagogue myself) that ended up being a place where warfare broke out. I’m not quite sure when this happened, but if I had to guess I’d say50 years ago at least with pretty advanced weaponry (like cannons, or even more modern weapons). The lack of rubble would suggest that it happened in a different period; i.e. there is no war at this place anymore.
An alternative explanation (keeping in mind your fondness of dragons) would be that a dragon flew down and kind of destroyed the place, but that wouldn’t be something I personally would come up with just by seeing this place. 🙂
The one on the right is more convincing. I looks like it has actually been there for hundreds of years. Where as the other one looks too new.
It looks like an ancient meeting hall. Which was last used around 200 BC
I think that it would depend on where it is and how old it is as to if it is believable. If it is an ancient Greek temple, then the second one is more realistic, as archeolagists (sp?) may have damaged it doing excavation, as ancient Greek artefacts are highly sought after. However, if it is protected, the first one is more realistic.
Hope I helped!
Good luck with the project.
Dog
The drawings to the right are the better ones in my opinion. It looks like a building from Rome or Greece, possibly a temple. It looks like it just naturally grew old and started falling apart, it looks like a monument from over a thousand years ago.