In medieval iconography, Saint Nicholas is sometimes presented as taming a chained demon, who may or may not be black. However, no hint of a companion, demon, servant, or any other human or human-like fixed companion to the Saint is found in visual and textual sources from the Netherlands from the 16th until the 19th century.[16] According to a long-standing theory first proposed by Karl Meisen,[17] Zwarte Piet and his equivalents in Germanic Europe were originally presented as one or more enslaved demons forced to assist their captor. These chained and fire-scorched demons may have been redeveloped as black-skinned humans during the early 19th-century in the Netherlands in the likeness of Moors who work as servants for Saint Nicholas.[18]
One or more demons working as helpers for the saint can still be found in various Austrian, German, Swiss, Hungarian, Czech, Slovak, and Polish Saint Nicholas traditions in the characters of Krampus, Père Fouettard, Schmutzli, Perchta, Knecht Ruprecht, Rubbels, Hanstrapp, Little Babushka, Pelzebock, Klaubauf, and Belsnickel. These companions of Saint Nicholas are often depicted as a group of closely related figures who accompany Saint Nicholas through the territories formerly controlled by the Holy Roman Empire. The characters act as foils to the benevolent gift-giver, or strict disciplinarians who threaten to thrash or abduct disobedient children. Mythologist Jacob Grimm associated the character with the pre-Christian spirit kobold, who could be either benevolent or malicious.
The introduction of Zwarte Piet did coincide, by and large, with a change in the depiction of the Sinterklaas character. Prior to this change, he was often quite strict toward poorly behaved children and often presented as a sort of bogeyman.[15] Many of the terrifying characteristics that were later associated with Zwarte Piet were often attributed to him.[19] The presentation of a holy man in this light was troubling for both teachers and priests. After the introduction of Zwarte Piet as Sinterklaas' servant, both characters adopted more gentle personas.[20]
The lyrics of older traditional Sinterklaas songs, still sung today, warn that Sinterklaas and his assistant will leave well-behaved children presents but punish those who have been naughty. They might even take very poorly behaved children to their homeland of Spain in burlap sacks where, according to legend, they'll be forced to assist them in their workshop for an entire season or longer. These songs and stories also warn that a child who has been only slightly naughty will receive a bundle of birch twigs or a lump of coal instead of gifts.