They were, he guessed, reproductions of paintings by the many artists whose work graced the city’s buildings; and that had been most of the greatest artists of the Renaissance, that time in human history when art and science had not so much progressed or flourished as exploded in the minds of so many men of brilliance. It had been an era when the shackles of a corrupt and authoritarian church had begun to be loosened, yet so much of the art of the era had been sacred, and used to decorate many of the churches and cathedrals of Europe’s great cities.