▁the ▁north , ▁and ▁the ▁later ▁Engineering ▁and ▁Elect rical ▁Building ▁( 1 9 2 8 ) ▁to ▁the ▁south . ▁In ▁ 1 9 2 6 , ▁add itions ▁were ▁built ▁and ▁the ▁complex ▁was ▁claimed ▁to ▁be ▁the ▁largest ▁structure ▁of ▁its ▁kind ▁under ▁one ▁roof ▁in ▁the ▁world . ▁In ▁ 1 9 3 1 , ▁the ▁Hor se ▁Palace ▁was ▁built ▁next ▁door ▁to ▁provide ▁a ▁permanent ▁building ▁for ▁the ▁st ables ▁of ▁the ▁Winter ▁Fair . ▁From ▁ 1 9 4 2 ▁to ▁ 1 9 4 5 , ▁the ▁building ▁was ▁used ▁as ▁a ▁training ▁base ▁for ▁the ▁Royal ▁Canadian ▁Air ▁Force ▁during ▁World ▁War ▁II ▁and ▁known ▁as ▁the ▁' M anning ▁Dep ot '. ▁A ▁photo ▁of ▁it ▁as ▁the ▁RC AF ▁Mann ing ▁Dep ot ▁is ▁in ▁the ▁New ▁West min ster ▁Museum ▁and ▁Archives ▁# ▁I HP 9 5 6 2 - 0 0 3 . ▁After ▁the ▁war , ▁it ▁mainly ▁hosted ▁e quest rian ▁events ▁for ▁the ▁Royal ▁Agricult ural ▁Winter ▁Fair , ▁the ▁C NE ▁and ▁other ▁events . ▁The ▁ar ena ▁was ▁also ▁used ▁as ▁a ▁horse ▁bar n . ▁ ▁In ▁time ▁for ▁the ▁ 1 9 6 3 ▁C NE , ▁the ▁southern ▁fac ade ▁was ▁re construct ed . ▁As ▁part ▁of ▁the ▁renov ation , ▁the ▁southern ▁fac ade ▁was ▁re cl ad ▁with ▁black , ▁grey ▁and ▁white ▁s iding ▁and ▁a ▁new ▁front ▁pla za ▁was ▁built , ▁with ▁a ▁large ▁" CO