Diet of Augsburg
Nevertheless , the meetings of 1530 , 1547/48 and 1555 , during the Reformation and the ensuing religious war between the Catholic emperor and the Protestant Schmalkaldic League , are especially noteworthy . 
<triplet> religious war <subj> Schmalkaldic League <obj> participant <triplet> Schmalkaldic League <subj> religious war <obj> conflict