<a href="https://en.wikipedia.org/wiki/Coats_of_arms_of_the_Holy_See_and_Vatican_City#Holy_See" class="extiw" title="en:Coats of arms of the Holy See and Vatican City">Coat of arms of the Holy See</a> with gold key in <a href="https://en.wikipedia.org/wiki/bend_(heraldry)" class="extiw" title="en:bend (heraldry)">bend</a> as described in <a rel="nofollow" class="external text" href="http://www.google.com/search?tbm=bks&amp;hl=en&amp;q=%22present+usage+of+placing+a+gold+key%22">Donald Lindsay Galbreath, <i>A Treatise on Ecclesiastical Heraldry</i> (W. Heffer and Sons, 1930), p. 9</a>; Bruno Bernhard Heim, <i>Heraldry in the Catholic Church: Its Origin, Customs and Laws</i> (Van Duren 1978 <a href="//commons.wikimedia.org/wiki/Special:BookSources/9780391008731" title="Special:BookSources/9780391008731">ISBN 9780391008731</a>), p. 54; <a rel="nofollow" class="external text" href="http://www.google.com/search?tbm=bks&amp;hl=en&amp;q=%22key+or+in+bend%22#hl=en&amp;gs_nf=1&amp;ds=bo&amp;pq=%22key%20or%20in%20bend%22&amp;cp=21&amp;gs_id=o&amp;xhr=t&amp;q=%22key+or+in+bend+above%22&amp;pf=p&amp;tbm=bks&amp;sclient=psy-ab&amp;oq=%22key+or+in+bend+above%22&amp;gs_l=&amp;pbx=1&amp;bav=on.2,or.r_gc.r_pw.r_qf.&amp;fp=6f9bd45ac4ed1d98&amp;biw=1366&amp;bih=643">Heraldry Society of Great Britain</a>; <a rel="nofollow" class="external text" href="https://books.google.com/books?id=7VDcmDeLuV4C&amp;pg=PA891&amp;lpg=PA891&amp;dq=%22in+bend+is+gold%22&amp;source=bl&amp;ots=djLgchmUuS&amp;sig=REQ6zMkPibkMwxlAuRZTbTjAJug&amp;hl=en&amp;sa=X&amp;ei=WitSUO36Gc-5hAfUnYGICQ&amp;redir_esc=y#v=onepage&amp;q=%22in%20bend%20is%20gold%22&amp;f=false">Michel Pastoureau, "Keys" in Philippe Levillain, <i>The Papacy: An Encyclopedia</i> (Routledge 2002 </a><a href="//commons.wikimedia.org/wiki/Special:BookSources/9780415922302" title="Special:BookSources/9780415922302">ISBN 9780415922302</a>), vol. 2, p. 891.
<a href="//commons.wikimedia.org/wiki/User:F_l_a_n_k_e_r" title="User:F l a n k e r">F l a n k e r</a>
2007-12-12
<ul><li><a rel="nofollow" class="external text" href="http://www.google.com/search?tbm=bks&amp;hl=en&amp;q=%22present+usage+of+placing+a+gold+key%22">Donald Lindsay Galbreath, <i>A Treatise on Ecclesiastical Heraldry</i> (W. Heffer and Sons, 1930), p. 9</a>;</li>
<li>Bruno Bernhard Heim, <i>Heraldry in the Catholic Church: Its Origin, Customs and Laws</i> (Van Duren 1978 <a href="//commons.wikimedia.org/wiki/Special:BookSources/9780391008731" title="Special:BookSources/9780391008731">ISBN 9780391008731</a>), p. 54;</li>
<li><a rel="nofollow" class="external text" href="http://www.google.com/search?tbm=bks&amp;hl=en&amp;q=%22key+or+in+bend%22#hl=en&amp;gs_nf=1&amp;ds=bo&amp;pq=%22key%20or%20in%20bend%22&amp;cp=21&amp;gs_id=o&amp;xhr=t&amp;q=%22key+or+in+bend+above%22&amp;pf=p&amp;tbm=bks&amp;sclient=psy-ab&amp;oq=%22key+or+in+bend+above%22&amp;gs_l=&amp;pbx=1&amp;bav=on.2,or.r_gc.r_pw.r_qf.&amp;fp=6f9bd45ac4ed1d98&amp;biw=1366&amp;bih=643">Heraldry Society of Great Britain</a>;</li>
<li><a rel="nofollow" class="external text" href="https://books.google.com/books?id=7VDcmDeLuV4C&amp;pg=PA891&amp;lpg=PA891&amp;dq=%22in+bend+is+gold%22&amp;source=bl&amp;ots=djLgchmUuS&amp;sig=REQ6zMkPibkMwxlAuRZTbTjAJug&amp;hl=en&amp;sa=X&amp;ei=WitSUO36Gc-5hAfUnYGICQ&amp;redir_esc=y#v=onepage&amp;q=%22in%20bend%20is%20gold%22&amp;f=false">Michel Pastoureau, "Keys" in Philippe Levillain, <i>The Papacy: An Encyclopedia</i> (Routledge 2002 </a><a href="//commons.wikimedia.org/wiki/Special:BookSources/9780415922302" title="Special:BookSources/9780415922302">ISBN 9780415922302</a>), vol. 2, p. 891</li></ul>