In today’s world, each country has distinctly defined borders. When considering historical borders, we discovered that the oldest one in Europe is between Portugal and Spain, spanning over 1200 kilometers. Its significance lies not in its length but in its stability over time.
The border was established in 1297 during the Kingdom of Portugal. Remarkably, it has remained relatively unchanged despite numerous European borders being altered by wars.
However, some disputes persist, such as the town of Olivenza, which resides in Spain but is claimed by Portugal.














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