Wittelsbach coat of arms in the style of the 14th century.
The shield shape is chosen to go with File:Shield and Coat of Arms of the Holy Roman Emperor (c.1200-c.1300).svg.
The size and arrangement of the lozenges is informed by the equestrian seal of Louis IV (File:Posse Band 1 b 0084.jpg), as far as has been possible within the chosen shield shape.

Note that Louis IV also used the Wittelsbach lozenges per pale with the Palatine lion, as seen here: File:Posse_Band_1_b_0085.jpg.