Catholic Encyclopedia: St. Ludmilla - Bohemian duchess, grandmother of St. Wenceslaus. Strangled to death by assassins hired by her pagan daughter-in-law in 921. - http://www.newadvent.org/cathen/09416a.htm
Ludmila - Illustrated profile of the saint. - http://www.catholic-forum.com/saints/saintl16.htm