Was willst du dich betrüben
... that poet and minister Johann Heermann wrote the hymn Was willst du dich betrüben (Why do you want to distress yourself) during the Thirty Years' War?
... that poet and minister <a href="./Johann_Heermann" id="mwCoE" rel="mw:WikiLink" title="Johann Heermann">Johann Heermann</a> wrote the hymn <i id="mwCoI"><b id="mwCoM"><a href="./Was_willst_du_dich_betrüben" id="mwCoQ" rel="mw:WikiLink" title="Was willst du dich betrüben">Was willst du dich betrüben</a></b></i> (Why do you want to distress yourself) during the <a href="./Thirty_Years'_War" id="mwCoU" rel="mw:WikiLink" title="Thirty Years' War">Thirty Years' War</a>?