Seimas of the Grand Duchy of Lithuania
... that the Seimas of the Grand Duchy of Lithuania was officially abolished by the Union of Lublin in 1569?
... that the <b id="mwEo0"><a class="mw-redirect" href="./Seimas_of_the_Grand_Duchy_of_Lithuania" id="mwEo4" rel="mw:WikiLink" title="Seimas of the Grand Duchy of Lithuania">Seimas of the Grand Duchy of Lithuania</a></b> was officially abolished by the <a href="./Union_of_Lublin" id="mwEo8" rel="mw:WikiLink" title="Union of Lublin">Union of Lublin</a> in 1569?