Belgium–Luxembourg Economic Union Belgium–Luxembourg Economic Union The Belgium–Luxembourg Economic Union (, , ), abbreviated to BLEU or UEBL, is an economic union between Belgium and Luxembourg, two countries in the Benelux Union. BLEU was created by a treaty, signed on 25 July 1921, despite a referendum against such a proposal, between Belgium and Luxembourg, and came into effect upon ratification by the Luxembourg Chamber of Deputies on 22 December 1922. Under the terms of the treaty, the economic frontier was lifted and the Belgian franc and Luxembourg franc were set at a fixed parity (though revised in 1935 and 1944) establishing a monetary
Spanish Netherlands Spanish Netherlands Spanish Netherlands (; ; , ) was the collective name of States of the Holy Roman Empire in the Low Countries, held in personal union by the Spanish Crown (also called Habsburg Spain) from 1556 to 1714. This region comprised most of the modern states of Belgium and Luxembourg, as well as parts of northern France, southern Netherlands, and western Germany with the capital being Brussels. The Imperial fiefs of the former Burgundian Netherlands had been inherited by the Austrian House of Habsburg from the extinct House of Valois-Burgundy upon the death of Mary of Burgundy in 1482.