Anna Hedvig Büll (born Anna Hedwig Bühl, 4 February [O.S. 23 January] 1887 – 3 October 1981) was a Baltic German missionary from Estonia, who helped to save the lives of several thousand Armenian orphans during the Armenian genocide. The lives of Anna Hedvig Büll and four other female humanists from Europe, who bore witness to the Armenian genocide, are told in the 2015 film Map of Salvation.