Historical clue formulations

• Certain Bach compositions — 2020-10-25
• Sacred choral works — 2017-04-23
• Some Renaissance music — 2014-07-26
• Sacred pieces — 2014-06-19
• Mozart's "Ave Verum Corpus" and others — 2010-08-04
• Some a cappella music — 2009-04-11
• Sacred songs — 2005-09-05
• Some Vivaldi music — 2002-02-08
• Choral compositions — 2001-04-03
• Some church music — 2000-06-14
• Sacred songs — 1999-12-05