In Chalon-sur-Saône, Fortification works of the North Front, are carried out under the reign of Henri II, from 1547 to 1555, By Girolamo Bellarmato, Siennois engineer, Professor of mathematics and astronomy banished from his, Coming to France at the request of François 1er.


Bellarmato summarizes French and Italian research, As evidenced by the St Vincent Bastions, St Paul, St Pierre and the Royal Bastion of Chalon-sur-Saône (around 1550).


Immediately after taking the city by Protestants in 1562, It was decided to strengthen the defense of the city; Saint-Pierre Abbey was transformed into a garrison place and its church served as a stone career in 1582. New ramparts were raised, towards the city. Completed by ditches, These elements were clearly directed against the inhabitants to protect themselves from the revolts, in the context of wars of religion.

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