▁and ▁en larg ed ▁by ▁Sydney ▁Mitchell ▁adding ▁a ▁late ▁g oth ic ▁chap el . ▁In ▁ 1 9 1 3 ▁Robert ▁Lor imer ▁added ▁a ▁store y ▁to ▁the ▁main ▁block ▁much ▁impro ving ▁the ▁whole ▁group . ▁ ▁In ▁ 1 9 9 5 ▁Co ates ▁Hall ▁was ▁sold ▁to ▁St ▁Mary ' s ▁Music ▁School ▁and ▁houses ▁the ▁( de - con sec r ated ) ▁chap el ▁which ▁is ▁used ▁for ▁concert s . ▁The ▁Chap el ▁contains ▁three ▁st ained ▁glass ▁windows . ▁by ▁Nin ian ▁Com per ▁which ▁includes ▁Scotland ' s ▁first ▁sain ts , ▁St ▁Col um ba ▁and ▁St ▁Nin ian . ▁The ▁school ▁also ▁has ▁two ▁libraries , ▁staff ▁offices , ▁bed rooms ▁for ▁board ing ▁pup ils , ▁and ▁ 2 5 ▁music ▁practice ▁rooms . ▁Academ ic ▁subjects ▁are ▁mainly ▁taught ▁in ▁two ▁ 2 0 th ▁century ▁buildings ▁within ▁the ▁school ▁grounds . ▁ ▁The ▁school ▁is ▁surrounded ▁by ▁gard ens ▁in ▁the ▁heart ▁of ▁Edinburgh ' s ▁West ▁End ▁and ▁has ▁excellent ▁transport ▁connections ▁due ▁to ▁its ▁proxim ity ▁to ▁Hay market ▁railway ▁station ▁and ▁connecting ▁bus ▁and ▁tram ▁links . ▁ ▁The ▁Song ▁School ▁within ▁the ▁nearby ▁C athedral ▁prec inct ▁is ▁still ▁used ▁by ▁the ▁Chor ister s ▁for ▁daily ▁practice , ▁where ▁they ▁are ▁surrounded ▁by ▁beautiful ▁mur als ▁by ▁Pho eb e ▁Anna ▁Tra qu air . ▁ ▁It ▁was ▁these ▁mur als ▁( 1 8 8 8 – 9 2 ), ▁which ▁won