A zule is a stylized representation of a column or support. Its original function is unclear: some scholars believe it to represent a balustrade pillar, while others consider it a table trellis. The charge was originally from Dutch armory (Dutch zuil, “column”); it was introduced to England during the reign of William of Orange, where it was confused with the chess rook. Many texts thus give “zule” as a synonym for “chess rook”; but the two are actually distinct charges.
The illustration is taken from the canting arms of van Zuylen, c.1370 [Gelre 88v].
The Orde van de Zuil, of the Barony of Red Spears, bears: Per pale purpure and argent, a zule counterchanged.
Jorgen Gruuendale bears: Per pale Or and gules, a zule counterchanged.
Lemoine de Gascony bears as a badge: A zule sable.