Rone Church
... that seafarers have used the tower of Sweden's Rone Church as a navigational aid since the Middle Ages?
... that seafarers have used the tower of Sweden's <b id="mwIg"><a href="./Rone_Church" id="mwIw" rel="mw:WikiLink" title="Rone Church">Rone Church</a></b> as a <a href="./Navigational_aid" id="mwJA" rel="mw:WikiLink" title="Navigational aid">navigational aid</a> since the <a href="./Middle_Ages" id="mwJQ" rel="mw:WikiLink" title="Middle Ages">Middle Ages</a>?