On this date in 1522, the leader of the Revolt of the Brotherhood came to his grief in Valencia. Spain circa 1519-1520 was a powder keg. The rival kingdoms Aragon and Castille had of late been joined by a personal union of Ferdinand and Isabella, but now that couple was several years dead, and the scepter held by an irritating Flemish youth who had just popped in to hike everyone’s taxes so he could fund the bribe campaign necessary to become the Holy Roman Emperor Charles V. These tensions triggered the Revolt of the Comuneros in Castile, whose consequent executions...