When was Rio capital of Portugal? Rio de Janeiro, Brazil, was the capital of Portugal for 14 years while Portugal was fighting France in the Napoleonic Wars. More from my siteHow many years of peace were recorded in history?Benito Mussolini’s other occupationsChanges in blood type of native AmericansCats in warfareHow long did it take to mummify a dead person?Was the attack on Pearl Harbor meant to be a surprise? 0 comments   Get Livefyre FAQ Sign in + Follow Post comment Link Newest | Oldest