November 25 marks the day the Portuguese conquered Goa, becoming the first Europeans to own territory in India. Goa would remain with the Portuguese for the next 400 years, making them the last European colonial power to leave India, in 1961. Why did the Portuguese first come to India? Why did Alfonso de Albuquerque capture Goa, when that was not the task he was sent to perform by Portugal's King Manuel? Here are three important things you should know.