Saint Walpurga or Walburga ( Old English : Wealdburg ; c. 710 - 25 February 777 or 779 ) , also spelled Valderburg or Guibor , was an English missionary to the Frankish Empire .
Saint Walpurga or Walburga ( Old English : Wealdburg ; c. 710 - February 25 , 777 or 779 ) , also spelled Valderburg or Guibor , was an English missionary to the Frankish Empire .