▁The ▁Nov i ▁D vor ▁became ▁the ▁official ▁royal ▁residence ▁in ▁June ▁ 1 9 2 2 , ▁when ▁King ▁Alexander ▁I ▁of ▁Y ug oslav ia ▁and ▁Queen ▁Maria ▁moved ▁in . ▁Their ▁sons , ▁princes ▁Peter , ▁Andrew ▁and ▁Tom is lav ▁often ▁played ▁war ▁in ▁the ▁garden ▁on ▁the ▁object ▁believed ▁to ▁be ▁an ▁Observ ation ▁Post ▁of ▁the ▁Ser bian ▁Army ▁High ▁Command ▁on ▁K aj m ak č al an . ▁The ▁royal ▁family ▁later ▁moved ▁to ▁Bel i ▁D vor ▁on ▁D ed in je ▁and ▁the ▁building ▁was ▁adapted ▁into ▁the ▁Museum ▁of ▁Prince ▁Paul , ▁later ▁the ▁National ▁Museum ▁in ▁Bel grade , ▁until ▁ 1 9 4 8 . ▁Today , ▁the ▁building ▁is ▁the ▁seat ▁of ▁the ▁President ▁of ▁Ser bia . ▁ ▁Soviet ▁intelligence ▁agent ▁Must af a ▁Gol ub ić ▁was ▁arrested ▁by ▁the ▁German ▁occup ational ▁forces ▁in ▁ 1 9 4 1 . ▁He ▁was ▁apparently ▁the ▁preferred ▁leader ▁of ▁the ▁Commun ist ▁Party ▁of ▁Y ug oslav ia ▁by ▁St alin , ▁as ▁opposed ▁to ▁the ▁present ▁leader ▁Jos ip ▁Bro z ▁T ito . ▁It ▁is ▁believed ▁that ▁the ▁party ▁t ipped ▁off ▁Gol ub ić ▁to ▁the ▁Germ ans , ▁who ▁received ▁an ▁" anonymous " ▁tip ▁on ▁his ▁where about s . ▁He ▁was ▁r uth lessly ▁tort ured ▁(" his ▁all ▁b ones ▁were ▁broken ") ▁and ▁carried ▁by ▁the ▁German ▁soldiers ▁on ▁the ▁canvas ▁into ▁the ▁Royal ▁Garden . ▁He ▁was ▁in ▁such