The Belgian municipality of Baarle-Hertog and the Dutch municipality of Baarle-Nassau form one of the most complex geopolitical jigsaw puzzles on Earth. Located within the Netherlands, the area consists of 22 Belgian exclaves surrounding 7 Dutch sub-enclaves. This intricate border layout traces back to medieval land swaps, treaties, and sales between the Dukes of Brabant and the Lords of Breda dating back to 1198.
As a result, the sovereign frontier slices through public streets, cafes, shops, and even residential homes. Under local administrative rules, a building's national identity and tax jurisdiction were historically determined by the location of its front door. To optimize tax liability or legal status, homeowners frequently moved their front doors a few meters to switch countries.
When a front door sits directly on the international boundary line, or when a house has access points in both Belgium and the Netherlands, property owners often install two distinct doorbells. Each doorbell connects to a separate municipal infrastructure, representing a Dutch address on one side and a Belgian address on the other. Residents receive mail from both Dutch and Belgian postal services, pay taxes according to their door location, and navigate dual municipal utility networks.
During global health lockdowns and varying national regulations, these dual-doorbell homes faced absurd situations where one side of the living room was subject to Belgian laws while the kitchen followed Dutch mandates.