Nostradamus C1 Q20: The musical nation that threatens France.
Copyright: Allan Webber, December 2015

This verse is one of several that imply Nostradamus' use of musical means to emphasise his astronomic code. From its placement in this particular verse it is possible to conclude that this style of encodement is mainly relevant to a period of invasion in France.

The structures defined by the adjacent anagrams are highlighted by the the first and second lines. The first line has Neatest rimes ( Reims_et Nates) +  Bolis a meistersinger notates{shooting star} (Blois_ A_ngiers Reims et_ Nates To) + our testaments / [statements] roles(ms et Nates T_our_s Orle)

And the second line provides further structure fo Nostradamus' astronomic focus. It says men change bit (bit _change_men) sub-par teaching ( par $ub_it change) cementing apex-vertices (ment Cite_ [Cite]s vexees par)

These ties to Meistersinger makes it likely that it relates to musical code used in the German occupation of France in the 20th Century and Nostradamus' use of the same mechanism for dating  star changes.