The Romani people in Portugal are known as ciganos (Portuguese pronunciation: [siˈɣɐnuʃ], [siˈɡɐ̃nus]), and their presence in such area goes back to the second half of the 15th century. Early on, due to their sociocultural differences and nomadic lifestyle, the ciganos were the object of fierce discrimination and persecution. The large majority of Portuguese ciganos belong to the Iberian Kale (Kalos) group, like the Spanish Romani people, called gitanos. Portuguese Ciganos and Spanish Gitanos are the same group of people. The number of Romani people in Portugal is difficult to estimate, since it is forbidden to collect statistics about race or ethnic categories in the country. According to data from Council of Europe's European Commission against Racism and Intolerance there are about 40,000 to 50,000 spread all over the country. According to the Portuguese branch of Amnesty International, there are about 30,000 to 50,000.