▁well ▁as ▁con ifer ous ▁ones ▁from ▁R ila , ▁black ▁p ines ▁and ▁spr u ces . ▁ ▁Frei ▁period ▁( 1 9 0 6 – 1 9 3 4 ) ▁The ▁Als at ian ▁Joseph ▁Frei ▁was ▁appointed ▁manager ▁of ▁all ▁gard ens ▁and ▁par ks ▁of ▁Sof ia ▁in ▁ 1 9 0 6 . ▁He ▁re organ ized ▁Bor is ova ▁grad ina ▁according ▁to ▁his ▁own ▁plan ▁further ▁developing ▁the ▁one ▁of ▁Ne ff . ▁In ▁carrying ▁out ▁this ▁plan ▁Frei ▁plant ed ▁the ▁two ▁main ▁alle ys ▁in ▁the ▁lower ▁part ▁of ▁the ▁garden , ▁the ▁l inden ▁and ▁ch est nut ▁one , ▁and ▁opened ▁the ▁wide ▁central ▁and ▁two ▁side ▁alle ys ▁in ▁the ▁upper ▁part , ▁from ▁the ▁children ' s ▁play ground ▁to ▁the ▁Fish ▁Lake . ▁This ▁period ▁also ▁witness ed ▁the ▁construction ▁of ▁the ▁People ' s ▁F ount ain , ▁later ▁faced ▁with ▁fre estone ▁to ▁be ▁named ▁the ▁Fre estone ▁F ount ain . ▁ ▁While ▁Ne ff ▁was ▁an ▁adm ir er ▁of ▁ac acia ▁trees , ▁Frei ▁had ▁a ▁passion ▁for ▁flowers . ▁He ▁created ▁the ▁Ros arium ▁at ▁the ▁place ▁of ▁removed ▁agricult ural ▁buildings , ▁as ▁well ▁as ▁the ▁numerous ▁modern ▁nur ser y ▁gard ens ▁and ▁h oth ouses . ▁The ▁garden ▁was ▁further ▁extended ▁south ▁of ▁the ▁o ak ▁forest ▁to ▁the ▁modern ▁Drag an ▁Ts ank ov ▁Bou lev ard . ▁The ▁fruit ▁plant ations ▁were ▁gradually ▁replaced ▁with ▁decor ative ▁tree