The stork and (just visible) a frog with a crown fit the context of the city of Meppel. The stork is Meppel's most important cultural-historical mascot.
The crowned frog refers to a well-known fairy tale, The Frog King. This reflects the literal transformation of the location itself: a formerly ugly, "dirty," and grimy public peeing spot has been transformed by art into something beautiful, regal, and royally fresh.