Did you know that Polish people represent the highest percentage of the foreign-born population in Norway? Or that the largest proportion of immigrants to the Republic of Ireland hail from the UK?

These four maps, created by Jakub Marian, a Czech linguist, mathematician and artist, are based on a 2015 study by the United Nations on international migration. They show European migration split into various numbers:

1. The percentage of the population of each country that is made up of foreign-born migrants

2. The most common country of origin for that number