Pachycephalosaurus is the fourth Mesozoic lizard to appear on the Czech Mint's silver coin from the Prehistoric World series.

The characteristic feature of the pachycephalosaurus was its extremely thick skull that formed a kind of protective helmet. The top of the skull was more than 25 centimetres thick. This unusual feature has led to the hypothesis that the dinosaur used its armoured head as a battering ram to defend itself from predators or at mating time, when two rivals held a knock-down contest - much like today's sheep and goats. But it's not certain their vertebrae could have supported such a load. The head of the pachycephalosaur was still adorned with a wreath of bony horns. The teeth of the five-metre-long creature suggest it was herbivorous and grazed tough vegetation.

The reverse side of the coin was dedicated by the medal maker Petr Patka, DiS., to the depiction of a thick-beaked pachycephalosaur in vivid colours, which were achieved by means of colouring technology. No photographs or computer graphics were used as a template - the author of the coin created an original painting. The embossed relief shows a Mesozoic wildlife with two other rival pachycephalosaurs. The composition of the reverse side is supplemented with the inscription PACHYCEPHALOSAURUS. The obverse side of the coin, which is common to the entire cycle, then presents a fossilized skeleton of a tyrannosaurus and the English inscription PREHISTORIC WORLD. As the licence to issue commemorative coins of the Czech Mint is granted by the Pacific island of Niue, the obverse side bears its necessary attributes - the national emblem, the nominal value of 1 DOLLAR (NZD) and the year of issue 2022.

You can save the coin dedicated to the dinosaur in a collector's album that is full of interesting facts about the life of giant lizards.