Similarly, what caused the decline of the Portuguese empire?
Fall. The Portuguese Empire, like the British, French and German empires, was fatally damaged by the two world wars fought in the 20th century. These European powers were pressured by the Soviet Union and the United States and by independence movements inside the colonial territories.
Beside above, what was the reason for the decline of Portuguese power in the 17th century? British and Dutch were strong competition for the Portuguese extension of the former control areas and gaining supremacy in trade along the south sea has also been a reason for the decline.
Just so, when did the Portuguese empire start and end?
One of the longest-lived empires in world history, it existed for almost six centuries, from the capture of Ceuta in 1415, to the handover of Portuguese Macau to China in 1999.
When did the Spanish empire decline?
17th Century
