Dieppe
First recorded as a small fishing settlement in 1030, Dieppe was an important prize fought over during the Hundred Years' War.
Dieppe housed the most advanced French school of cartography in the 16th century. Two of France's best navigators, Michel le Vasseur and his brother Thomas le Vasseur, lived in Dieppe when they were recruited to join the expedition of René Goulaine de Laudonnière which departed Le Havre for Florida on April 20, 1564. The expedition resulted in the construction of Fort Caroline, the first French colony in the New World. Another expedition two years before where Goulaine de Laudonnière was under command of Jean Ribault, a local Huguenot captain, had resulted in the foundation of Charlesfort, now in South Carolina. Dieppe was the premier port of the kingdom in the 17th century.
On July 23, 1632, 300 colonists heading to New France departed from Dieppe.
At the Revocation of the Edict of Nantes in 1685, Dieppe lost 3,000 of its Huguenot citizens, who fled abroad.
History of Trier
With the peace treaties of Basel and Campo Formio in 1797, German hegemonic powers Prussia and Austria ceded all German territories on the left bank of the Rhine river to France. Trier became a "de facto" French city. The University of Trier was dissolved in the same year. In 1798, it became the capital of the newly founded French Département de la Sarre. With the Treaty of Lunéville in 1801, Trier became also a "de jure" French city. In 1801, Napoleon Bonaparte signed a concordate with Pope Pius VII, thus stopping defamations of clerics and making Trier a diocese. Its territory was identical with the Département de la Sarre, much smaller than the Archbishopric of Trier had been until 1794. In 1802, the Frenchman Charles Mannay became first bishop of the new founded diocese and, in 1803, the first Holy Mass since 1794 was celebrated in the Cathedral of Trier. Emperor Napoleon visited Trier in 1804. In this time, French Trier began to prosper.