▁Beg ▁( ; ▁probably ▁born ▁in ▁mid - 1 4 2 0 s ▁in ▁B urs a ) ▁was ▁an ▁Ott oman ▁b ureau c rat ▁and ▁historian ▁who ▁wrote ▁a ▁chron icle ▁dedicated ▁to ▁Me h med ▁II . ▁ ▁Life ▁and ▁career ▁T urs un ▁Beg ' s ▁life ▁is ▁only ▁known ▁from ▁references ▁in ▁his ▁chron icle . ▁ ▁He ▁came ▁from ▁a ▁prominent ▁tim ari ot ▁family ▁and ▁held ▁a ▁tim ar ▁himself . ▁He ▁worked ▁in ▁the ▁imperial ▁div an ▁and ▁accompanied ▁Me h med ▁II ▁during ▁the ▁sie ge ▁of ▁Constantin ople ▁in ▁ 1 4 5 3 ▁that ▁led ▁to ▁the ▁fall ▁of ▁Constantin ople . ▁ ▁Works ▁T urs un ▁Beg ' s ▁only ▁known ▁work ▁is ▁the ▁T ari h - i ▁Eb ül f eth ▁( ت ا ر ي خ ▁ ا ب و ▁ال ف ت ح ▁in ▁Ott oman ; ▁" The ▁History ▁of ▁the ▁Con quer or "). ▁ ▁Bibli ography ▁T urs un ▁Beg . ▁ ▁The ▁history ▁of ▁Me h med ▁the ▁Con quer or . ▁ ▁[ T ari h - i ▁Eb ül f eth ] ▁Hal il ▁In al ci k ▁and ▁R ho ads ▁Mur phe y ▁trans . ▁ ▁Min ne apolis : ▁Bibli othe ca ▁Islam ica , ▁ 1 9 7 8 . ▁Wood head , ▁Christ ine . ▁ ▁" T urs un ▁Beg ." ▁ ▁Encyc lo pa edia ▁of ▁Islam . ▁▁ 2 nd ▁Edition . ▁