Simplify the following text for a Grade 13 native English-speaking person.
Original: The new dukes changed the Saxon horse emblem and used their Ascanian family colors and emblem ( black and gold stripes ) and added a `` bendwise crancelin '' , a crown diagonally across the coat of arms , symbolising the Saxon ducal crown , as new coat-of-arms of Saxony .
Simplified: The new dukes replaced the Saxon horse emblem and introduced their Ascanian family colors and emblem added by a bendwise crancelin , symbolising the Saxon ducal crown , as new coat-of-arms of Saxony .