The northern part was rattached to the baronny of Breda and has been named Baarle-Nassau since Breda became the main place of Nassau family in the beginning of the 15th century. The commune limits are very complicated. Nowadays, each commune has its city hall, church, police, school and post office. The houses of the two nationalities are totally mixed. In the local pubs is a billiard table, where the balls pass the international boundary unchecked millions of times.
Many houses have the front door in Belgium and the rest of the house in the Netherlands.
The flag is red, with three yellow eight-pointed stars, two above and one beneath a sort of bar. The diamonds have a sort of a red and white fimbriation. The flag was adopted on October 12, 1979. These have never been recorded. Since then red and white have become the official colors of the municipality.