This makes my eyes feel...amazed by this. The Dark Fantasy subgenre mixes Fantasy with Horror Elements, and many locations in the Dark Fantasy subgenre have Gothic architecture, like Gothic windows. That is a great job you did on this one!
This is probably my favorite out of all your art. The window itself is stunning, but the colored light beaming through it and lighting up the floor truly brings the beauty to this piece. The figure standing by the window is also a lovely touch.