▁without ▁blue ▁decor ations , ▁but ▁it ▁has ▁kept ▁its ▁name ▁after ▁Ö st berg ' s ▁original ▁design . ▁It ▁is ▁known ▁as ▁the ▁d ining ▁hall ▁used ▁for ▁the ▁ban quet ▁held ▁after ▁the ▁annual ▁Nobel ▁Prize ▁award ▁ceremony . ▁The ▁organ ▁in ▁the ▁Blue ▁Hall ▁is ▁with ▁its ▁ 1 0 , 2 7 0 ▁pip es ▁the ▁largest ▁in ▁Sc and in avia . ▁A bove ▁the ▁Blue ▁Hall ▁lies ▁the ▁Golden ▁Hall ▁( G yll ene ▁Sal en ), ▁named ▁after ▁the ▁decor ative ▁m osa ics ▁made ▁of ▁more ▁than ▁ 1 8 ▁million ▁t iles . ▁The ▁m osa ics ▁make ▁use ▁of ▁mot ifs ▁from ▁Swedish ▁history . ▁They ▁were ▁executed ▁by ▁the ▁Berlin , ▁Germany , ▁firm ▁of ▁Pu hl ▁& ▁Wagner ▁( G ott fried ▁Hein ers dor ff ), ▁after ▁nine ▁years ▁of ▁negoti ations ▁by ▁Gott fried ▁Hein ers dor ff ▁( 1 8 8 3 - 1 9 4 1 ) ▁for ▁the ▁commission . ▁ ▁The ▁sout heast ▁corner ▁of ▁the ▁building , ▁immediately ▁adjacent ▁to ▁the ▁shore , ▁is ▁marked ▁by ▁a ▁monument al ▁tower ▁crown ed ▁by ▁the ▁Three ▁Crow ns , ▁an ▁old ▁national ▁symbol ▁for ▁Sweden . ▁The ▁tower ▁is ▁ 1 0 6 ▁metres ▁high ▁and ▁is ▁accessible ▁by ▁an ▁elev ator ▁or ▁by ▁a ▁st air ▁of ▁ 3 6 5 ▁steps . ▁The ▁eastern ▁side ▁of ▁its ▁base ▁is ▁decor ated ▁with ▁a ▁gold - pl ated ▁c en ot aph ▁of