▁However , ▁Austria ▁didn ' t ▁demol ish ▁the ▁buildings ▁outside ▁of ▁the ▁for tr ess ▁walls , ▁including ▁the ▁Great ▁military ▁hospital , ▁which , ▁al beit ▁as ▁a ▁ru in , ▁surv ived ▁until ▁the ▁next ▁Aust rian ▁occupation ▁in ▁ 1 7 8 8 . ▁ ▁Royal ▁Garden ▁▁ ▁Sto jan ▁Sim ić , ▁a ▁politician ▁and ▁a ▁business man , ▁member ▁of ▁the ▁influ ential ▁Sim ić ▁family , ▁notable ▁in ▁the ▁ 1 9 th ▁century ▁Ser bia ▁both ▁in ▁politics ▁and ▁culture , ▁purchased ▁the ▁lot ▁in ▁the ▁late ▁ 1 8 3 0 s . ▁It ▁was ▁a ▁piece ▁of ▁mar sh land ▁which ▁en comp ass ed ▁the ▁modern ▁features ▁of ▁St ari ▁D vor , ▁P ione ers ▁Park ▁and ▁Park ▁Aleks and rov . ▁Sim ić ▁dra ined ▁the ▁mar sh , ▁filled ▁and ▁le ve led ▁the ▁terrain ▁and ▁on ▁the ▁northern ▁side ▁of ▁the ▁modern ▁K ral ja ▁Mil ana ▁street ▁constructed ▁a ▁house ▁ 1 8 4 0 - 4 2 . ▁The ▁ed ifice ▁became ▁known ▁as ▁the ▁Old ▁Kon ak . ▁Development ▁of ▁the ▁first ▁Ser bian ▁royal ▁comp ound ▁began ▁in ▁ 1 8 4 3 - 4 3 , ▁when ▁the ▁r uling ▁prince ▁Alexander ▁K ara đ or đ e vić ▁purchased ▁the ▁kon ak ▁with ▁the ▁surrounding ▁garden . ▁Princess ▁Pers ida , ▁the ▁wife ▁of ▁Prince ▁Aleks and ar , ▁paid ▁attention ▁to ▁the ▁cultiv ating ▁of ▁the ▁court ▁garden ▁and ▁turning ▁it