An anille is an architectural anchor-plate, used with tie-rods to brace and support masonry. In German blazonry, it’s thus known as a Maueranker, “wall anchor”. The anille is a period charge, found in the arms of van Oestvelt or Oostvelt, c.1370 [Gelre 96v]. It is fesswise by default. See also millrind.
Avid Zvonikha bears: Purpure, an anille argent.