Born in 1397 from count John of Heinsberg and Marguerite of Genappe. It is Archdeacon of Hesbaye when at age 23, he was elected on 16 June 1419, prince-Bishop of Liège. It is confirmed to his charge on 10 September 1419 by Pope Martin v. He participated in the crusade against the hussites (Jean Hus precursor of Protestantism) in 1420. On 14 July 1430, Jean de Heinsberg declares war on the Duke of Burgundy Philip the good, who had bought the County of Namur. The castle of Poilvache (County of Namur) fell and was demolished. Philip the good inherits from Brabant and became Duke of Brabant and Limburg. The Principality of Liège is surrounded and the prince-Bishop sign an unfavorable peace (Treaty of Malines) December 15, 1430. On 31 March 1455, Philippe the good necessary the abdication of Jean de Heinsberg, because it wishes to place a member of his family at the head of the bishopric of Liège. Pope Callixtus III gives the bishopric of Liège in Bourbon Louis March 30, 1456. Jean de Heinsberg died at the castle of Curange October 18, 1459.
This black billon is struck with the hammer in Liège. The reverse of this currency represents saint Lambert. This is the first time that the patron saint of Liège is represented on a coin of low billon. The saint is dressed with a superhumeral (ephod), it is a fault of chronology, because the port of this priestly ornament is use in 1135 under albero II of Chiny.
Avers : Une croix traversant la légende avec au centre les armoiries du prince. Obverse: A cross through legend with in the centre the arms of the prince.
Revers : Buste de face de saint Lambert, revêtu du superhuméral, nimbé et mitré. Reverse: Bust of front of saint Lambert, the superhumeral-coated, shrouded and mitred.
Diamètre : 20,0 à 21,5 mm
Diameter: 20.0 to 21.5 mm
Poids : 0,85 à 1,30 gr
Weight: 0.85 to 1.30 gr
Axe : Divers
Métal : Billon noir
Metal: Billon black
Degré de rareté : Très rare
Degree of rarity: Very rare
Cotation 2010, valeur conjecturée : 220 €
Rating 2010, value conjectured : € 220