A Siege of Boulogne took place in 1492 when the English Tudor King Henry VII took the lightly defended lower town of Boulogne in the Pas-de-Calais, France. Fifty years later as allies of the Holy Roman Emperor Charles V, during the war against the French, the English returned led by Henry VII's son and heir, Henry VIII. There were two further sieges during this war. Boulogne was fortified and defended as an English possession on the French mainland between 14 September 1544 and March 1550.

• http://en.wikipedia.org/wiki/Sieges of Boulogne (1544–46)