One of my older pieces that is fitting for this contest.

Thanks to all the DeviantArt stock providers:
mjranum-stock - http://mjranum-stock.deviantart.com/
dearx - http://dearx.deviantart.com/
Stock-gallery - http://stock-gallery.deviantart.com/
Mind-Matter - http://mind-matter.deviantart.com/
ArrsistableStock - http://arrsistablestock.deviantart.com/

Layer masking, cleaned up silo and used its texture on castle in several pieces, blending modes Darken; painted in shadows under horses, and mist; helmet masked, Darken, opacity lowered.