The <a href="https://en.wikipedia.org/wiki/Treaty_of_Montgomery" id="mwLA" rel="mw:WikiLink" title="Treaty of Montgomery">Treaty of Montgomery</a> recognises <a href="https://en.wikipedia.org/wiki/Llywelyn_ap_Gruffudd" id="mwLQ" rel="mw:WikiLink" title="Llywelyn ap Gruffudd">Llywelyn ap Gruffudd</a> as Prince of Wales, but only as a vassal of <a href="https://en.wikipedia.org/wiki/Henry_III_of_England" id="mwLg" rel="mw:WikiLink" title="Henry III of England">King Henry III</a>.<sup about="#mwt33" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-4"}}' id="cite_ref-4" rel="dc:references" typeof="mw:Extension/ref"><a href="./September_29#cite_note-4" id="mwLw" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwMA">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt30" class="citation encyclopaedia cs1" id="CITEREFSmith2004">Smith, J. B. (23 September 2004). "Llywelyn ap Gruffudd (d. 1282), prince of Wales". <i id="mwCoE"><a href="./Dictionary_of_National_Biography#Oxford_Dictionary_of_National_Biography" id="mwCoI" rel="mw:WikiLink" title="Dictionary of National Biography">Oxford Dictionary of National Biography</a></i> (online<span id="mwCoM" typeof="mw:Entity"> </span>ed.). Oxford University Press. <a class="mw-redirect" href="./Doi_(identifier)" id="mwCoQ" rel="mw:WikiLink" title="Doi (identifier)">doi</a>:<a class="external text" href="https://doi.org/10.1093%2Fref%3Aodnb%2F16875" id="mwCoU" rel="mw:ExtLink nofollow">10.1093/ref:odnb/16875</a>.</cite><span about="#mwt30" class="Z3988" id="mwCoY" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Llywelyn+ap+Gruffudd+%28d.+1282%29%2C+prince+of+Wales&amp;rft.btitle=Oxford+Dictionary+of+National+Biography&amp;rft.edition=online&amp;rft.pub=Oxford+University+Press&amp;rft.date=2004-09-23&amp;rft_id=info%3Adoi%2F10.1093%2Fref%3Aodnb%2F16875&amp;rft.aulast=Smith&amp;rft.aufirst=J.+B.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ASeptember+29"></span><span about="#mwt30" id="mwCoc" typeof="mw:Entity"> </span><span about="#mwt30" id="mwCog" style="font-size:0.95em; font-size:95%; color: var( --color-subtle, #555 )">(Subscription or <a class="external text" href="https://www.oxforddnb.com/help/subscribe#public" id="mwCok" rel="mw:ExtLink nofollow">UK public library membership</a> required.)</span><link about="#mwt30" href="./Category:Wikipedia_articles_incorporating_a_citation_from_the_ODNB" id="mwCoo" rel="mw:PageProp/Category"/></span>