Timeline of Romani history
The Romani people have long been a part of the collective mythology of the West, where they were (and very often still are) depicted as outsiders, aliens, and a threat. For centuries they were enslaved in Eastern Europe and hunted in Western Europe: the Pořajmos, Hitler's attempt at genocide, was one violent link in a chain of persecution that encompassed countries generally considered more tolerant of minorities, such as the United Kingdom.
Source: Wikipedia — Timeline of Romani history (CC BY-SA 4.0)