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Books about Tongres:
Tongre (Collection Folio junior) (French Edition) by Yves Fremion (1986)
Tongres point de rencontre romain by N/A (1958)
Tongres la plus ancienne ville de Belgique by Baillien H. (1111)
Remparts D'arlon Et De Tongres... (French Edition) by Henri Schuermans (Feb 27, 2012)
Recherches Historiques Sur Tongres Et Ses Environs... (French Edition) by François Driesen and J L Guioth (Mar 7, 2012)
Wiki information Tongres:
Saint Martin of Tongres is venerated as the seventh bishop of Tongeren. He apostolized the Hesbaye district of Brabant.