Pact of Free Cities
... that the mayors of Prague, Bratislava, Warsaw, and Budapest signed the Pact of Free Cities in December 2019?
... that the mayors of Prague, Bratislava, Warsaw, and Budapest signed the <b id="mwBKU"><a href="./Pact_of_Free_Cities" id="mwBKY" rel="mw:WikiLink" title="Pact of Free Cities">Pact of Free Cities</a></b> in December<span id="mwBKc" typeof="mw:Entity"> </span>2019?