on . ▁The ▁head ▁of ▁the ▁House ▁of ▁H abs burg - L or raine ▁accord ed ▁her ▁the ▁her edit ary ▁title ▁of ▁" Pr in cess ▁of ▁Al ten burg " ▁on ▁ 1 5 ▁December ▁ 1 9 4 9 . ▁ ▁Their ▁children ▁were : ▁▁ ▁Prince ▁Karl - Ste fan ▁of ▁Al ten burg ▁( Bal ice , ▁Poland , ▁ 2 9 ▁October ▁ 1 9 2 1 ▁– ▁Stockholm , ▁ 2 0 ▁June ▁ 2 0 1 8 ); ▁married ▁in ▁Gene va , ▁Switzerland , ▁on ▁ 1 8 ▁September ▁ 1 9 5 2 ▁his ▁first ▁cousin , ▁Maria - Lou ise ▁Victoria ▁Kath arina ▁Elisabeth ▁af ▁Peters ens ▁( Sto ck holm , ▁ 4 ▁November ▁ 1 9 1 0 ▁– ▁Ö ster vik , ▁Sweden , ▁ 2 7 ▁May ▁ 1 9 9 8 ), ▁and ▁had ▁issue : ▁ ▁Princess ▁Maria - Christ ina ▁of ▁Al ten burg ▁( b . ▁Stockholm , ▁ 2 1 ▁April ▁ 1 9 5 3 ), ▁un mar ried ▁and ▁without ▁issue ▁ ▁Prince ▁Karl - Al bre cht ▁of ▁Al ten burg ▁( Sto ck holm , ▁ 2 4 ▁October ▁ 1 9 5 6 ▁– ▁Zürich , ▁ 2 6 ▁May ▁ 1 9 5 7 ) ▁ ▁Princess ▁Maria - Christ ina ▁of ▁Al ten burg ▁( Ż yw iec , ▁ 8 ▁December ▁ 1 9 2 3 ▁– ▁ 2 ▁October ▁ 2 0 1