During the period between 1347 and 1558, the French port that belonged to England was Calais.

Calais, a strategic coastal town located in northern France, became an English possession following the capture of the city by King Edward III during the Hundred Years' War. This event took place in 1347 and marked the beginning of an English reign over the port that lasted for more than two centuries.

As an important maritime gateway, Calais played a crucial role in England's trade and military operations. It provided a direct link between England and continental Europe, serving as a vital port for the English crown's economic and military interests. The control over Calais allowed England to establish a stronghold in France and exert considerable influence over the region.

During this period, Calais thrived as an English possession. The city became a major center for trade, attracting merchants and craftsmen from various parts of Europe. Its strategic location made it an ideal hub for the transportation of goods and facilitated the growth of a prosperous market economy.

Moreover, Calais served as a military base for England, enabling the crown to project its power across the English Channel. The port was heavily fortified, equipped with strong defensive structures such as the famous Calais Walls, which protected the city from potential attacks. Its strategic significance was further highlighted during the Battle of Crécy and the Siege of Calais, where it played a crucial role in England's military victories.

However, England's control over Calais eventually came to an end in 1558. The port was lost during the reign of Queen Mary I, also known as Mary Tudor or "Bloody Mary." Following a series of military defeats against the French, Calais was recaptured by the French forces, marking the end of England's long-held possession.

Despite the loss of Calais, its significance in history as a once English-ruled French port remains. The period between 1347 and 1558 represents a unique chapter in the relationship between England and France, characterized by conflicts, trade, and territorial ambitions.

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