The Civil Company of the Franco-Mexican Debt represents the organization established by French creditors of the Mexican loans of 1864 and 1865 the same ones contracted under the Empire of Maximilian I of Austria, supported by Napoleon III. After the Empire's collapse (1867) and Maximilian's execution at Querétaro, the republican government of Benito Juárez categorically refused to honor the "usurper's" debts. The thousands of French subscribers who had purchased these bonds found themselves without recourse. To defend their collective interests, they organized themselves into a civil company, headquartered at 15 Place Vendôme in Paris (one of the symbolic addresses of the Parisian financial world). This share N°316102, issued on 11 July 1889, twenty-two years after the Mexican Empire's fall, testifies to the long persistence of this diplomatic and financial dispute between France and Mexico. A unique document at the crossroads of grand history (Maximilian's Empire, Napoleon III) and the small financial history of aggrieved bondholders. A rare piece of exceptional historical interest.