Coat of Arms of the Duke of Westminster, i.e. "Quarterly: 1st and 4th, Azure a Portcullis with chains pendant Or on a Chief of the last between two united Roses of York and Lancaster a Pale charged with the Arms of King Edward the Confessor (i.e. the old arms of the City of Westminsteroriginally granted 1 October 1601 to Borough of Westminster, regranted by royal warrant dated 6 November 1901 to Metropolitan borough. Source: A.C. Fox-Davies, <i>The Book of Public Arms</i> (T. C. &amp; E. C. Jack, London, 1915. See <a href="//commons.wikimedia.org/wiki/File:Westminster_arms.png" class="image" title="Westminster arms"><img alt="Westminster arms" src="https://upload.wikimedia.org/wikipedia/commons/thumb/2/25/Westminster_arms.png/25px-Westminster_arms.png" decoding="async" width="25" height="17" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/2/25/Westminster_arms.png/38px-Westminster_arms.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/2/25/Westminster_arms.png/50px-Westminster_arms.png 2x" data-file-width="578" data-file-height="400"></a>)); 2nd and 3rd, Azure a Garb Or (Grosvenor), a reference to the garbs in the arms of the <a href="https://en.wikipedia.org/wiki/Earl_of_Chester" class="extiw" title="w:Earl of Chester">Earls of Chester</a>, their feudal overlords. These "modern" arms were adopted in 1389 after the family lost the famous lawsuit of <a href="https://en.wikipedia.org/wiki/Scrope_v_Grosvenor" class="extiw" title="w:Scrope v Grosvenor">Scrope v Grosvenor</a> contesting the right to the arms Azure, a bend or (Grosvenor "ancient")"
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