As hard-line Pentecostalism spreads across Brazil, some drug traffickers in gang-controlled areas of Rio de Janeiro are using religion as an excuse to attack nonbelievers.
As well as his 95 Theses, Luther took on the awesome challenge of a new German translation of the Bible in which he set out to challenge both doctrinal and social beliefs.
In the great reformer's eyes, if you didn't love a rousing tune you deserved only "the music of the pigs".
Martin Luther has always given the country a chance to examine itself. Half a millennium on, the picture is more complex than ever.
Meet Jakob Fugger, the man who underwrote the ambition of power-hungry medieval Princes.