<a href="https://en.wikipedia.org/wiki/Gąsawa_massacre" id="mwLA" rel="mw:WikiLink" title="Gąsawa massacre">Gąsawa massacre</a>: At an assembly of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Piast" id="mwLQ" rel="mw:WikiLink" title="Piast">Piast</a> dukes at <a href="https://en.wikipedia.org/wiki/Gąsawa" id="mwLg" rel="mw:WikiLink" title="Gąsawa">Gąsawa</a>, Polish Prince <a href="https://en.wikipedia.org/wiki/Leszek_the_White" id="mwLw" rel="mw:WikiLink" title="Leszek the White">Leszek the White</a>,  Duke <a href="https://en.wikipedia.org/wiki/Henry_the_Bearded" id="mwMA" rel="mw:WikiLink" title="Henry the Bearded">Henry the Bearded</a> and others are attacked by assassins while bathing.<sup about="#mwt30" 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="./November_24#cite_note-4" id="mwMQ" style="counter-reset: mw-Ref 4;"><span class="mw-reflink-text" id="mwMg">[4]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-4"><cite about="#mwt27" class="citation book cs1" id="CITEREFJasienica_Pawel2007"><a class="mw-redirect" href="./Pawel_Jasienica" id="mwBy0" rel="mw:WikiLink" title="Pawel Jasienica">Jasienica Pawel</a> (2007). <i id="mwBy4">Polska Piastow</i>. Proszynski. pp.<span id="mwBy8" typeof="mw:Entity"> </span>174, 236. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBzA" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBzE" typeof="mw:Entity"> </span><a href="./Special:BookSources/9788374694797" id="mwBzI" rel="mw:WikiLink" title="Special:BookSources/9788374694797"><bdi id="mwBzM">9788374694797</bdi></a>.</cite><span about="#mwt27" class="Z3988" id="mwBzQ" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Polska+Piastow&amp;rft.pages=174%2C+236&amp;rft.pub=Proszynski&amp;rft.date=2007&amp;rft.isbn=9788374694797&amp;rft.au=Jasienica+Pawel&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ANovember+24"></span></span>