Heinrich Toppler (born 1340 in Rothenburg ob der Tauber, died 13. June 1408) was mayor of the german city Rothenburg ob der Tauber.
more informations in Wikipedia article Heinrich Toppler
On his emblem there are 4 dice pictured.
The dice have tapered corners, which was partly made in the Middle Ages and antiquity.
more informations in heraldic wiki article Spielwürfeln
In addition, toppeln in old high german means to roll the dice.