In 1807, at the height of the Napoleonic wars, the Portuguese prince regent Dom João made an extraordinary decision. Although horrified by the idea of sea travel, he opted to transplant his entire court and government to Portugal’s largest colony, Brazil. With French troops closing in on Lisbon, aristocrats, ministers, priests and servants - a staggering 10,000 in all - clambered on board the rickety Portuguese fleet. After a rough transatlantic passage they spilled off their ships bedraggled, lice-ridden and dressed in rags, to the astonishment of their new world subjects. Thus began a unique 13-year period of imperial rule from the tropics. Rio de Janeiro was soon graced with a new opera house, lush botanical gardens and a royal palace - a ‘tropical Versailles’ set against the city’s stunning jungle-clad mountains. But this metropolitan façade only partially obscured the brutal workings of what was then the largest slaving port in the Americas. While the court grappled with the dark side of its own empire, Brazil, with its eclectic mix of African, European and indigenous influences, was coming of age.