What is the importance of calais

The town came to be called the "brightest jewel in the English crown" owing to its great importance as the gateway for the tin, lead, lace and wool trades (or "staples"). Calais was a territorial possession of England until its capture by France in 1558.

Calais was a territorial possession of england until it was captured by the france. it was englands brightest jewel in the english crown