Starting date of the <a href="https://en.wikipedia.org/wiki/First_Crusade" id="mwYg" rel="mw:WikiLink" title="First Crusade">First Crusade</a> as set by <a href="https://en.wikipedia.org/wiki/Pope_Urban_II" id="mwYw" rel="mw:WikiLink" title="Pope Urban II">Pope Urban II</a>.<sup about="#mwt23" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-2"}}' id="cite_ref-2" rel="dc:references" typeof="mw:Extension/ref"><a href="./August_15#cite_note-2" id="mwZA" style="counter-reset: mw-Ref 2;"><span class="mw-reflink-text" id="mwZQ">[2]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-2"><cite about="#mwt20" class="citation cs2" id="CITEREFHallam1989">Hallam, Elizabeth (1989), <i id="mwCF0">Chronicles of the Crusades: Eye-witness Accounts of the Wars Between Christianity and Islam</i>, Bramley, p.<span id="mwCF4" typeof="mw:Entity"> </span>63, <a class="mw-redirect" href="./ISBN_(identifier)" id="mwCF8" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwCGA" typeof="mw:Entity"> </span><a href="./Special:BookSources/9781858335896" id="mwCGE" rel="mw:WikiLink" title="Special:BookSources/9781858335896"><bdi id="mwCGI">9781858335896</bdi></a></cite><span about="#mwt20" class="Z3988" id="mwCGM" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Chronicles+of+the+Crusades%3A+Eye-witness+Accounts+of+the+Wars+Between+Christianity+and+Islam&amp;rft.pages=63&amp;rft.pub=Bramley&amp;rft.date=1989&amp;rft.isbn=9781858335896&amp;rft.aulast=Hallam&amp;rft.aufirst=Elizabeth&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAugust+15"></span></span>