The ancient glass windows tell stories about long forgotten hero's.
Almost all objects have a array modifier, it should not be too hard to shrink or enlarge the hallway. The stained glasses and the doorway are the only objects who don't have a array modifier.
Wood material for door: http://www.blendswap.com/blends/view/68707
Stained glass: https://misteraibo.deviantart.com/art/Stained-Glass-The-Elements-261408619
Stained glass: https://beckiergb.deviantart.com/art/Chaos-Overthrown-Poster-264318310
Stained glass: https://beckiergb.deviantart.com/art/Return-of-Harmony-Poster-262347366
Stained glass: https://beckiergb.deviantart.com/art/Friendship-is-Magic-Poster-262346996
"Stained Glass: The Elements by MisterAibo" is changed slightly, the black lines are made blacker.
Special thanks: https://boneswolbach.deviantart.com/art/Canterlot-Door-Opening-Refrences-330368775