Admiralty in the 16th century has organized the fleet into squadrons from at early 13th century and certainly during the 16th century. In 1560 three squadrons were operating in the Channel, Irish Sea and North Sea Until the 16th century, admirals were high officials under kings, and were charged with protecting the realm from sea attack. The English navy's Narrow Seas Squadron also called as the Eastern Squadron mainly operated in the two seas which laying between England and Kingdom of France (the English Channel particularly the Straits of Dover) and England and the Spanish Netherlands later the Dutch Republic (the southern North Sea). Include:
Paris in the 16th century "La Grève", in front of the modern City Hall, developed in the 11th century. The headquarters of the guild of merchants was located next to the port, and became the city hall. Another important early port was located on the north side of the Île-de-la-Cité, where the flower market is located today. Les Halles, the central market of Paris, had been founded in 1137 by King Louis VI. By the 16th century it was overcrowded and inefficient. Between 1543 and 1572, King rancis I and his successors gradually rebuilt the market into the form it kept until the time of