Complex sentence: In 1451, to help secure the salvation of his immortal soul, he established the "Eckennperger Stift", a hospital for the poor to which he later funded the addition of a small Chapel of All Saints and a family crypt.
Split into simpler sentences: In 1451, to help secure the salvation of his immortal soul, he established the "Eckennperger Stift". This was a hospital for the poor to which he later funded the addition of a small Chapel of All Saints and a family crypt.