Greetsiel has a long tradition of shipping. For centuries people along the costs made their living with fishing, whale catching and long-distance trading. Not only sailors came from these towns, also officers and captains. And these captains usually brought back lots of money (when they came back – lots of men and ships got lost to the sea in those times). So, in each town with a harbour you can find very gorgeous houses, once built by a captain.
Very often, such houses are near to the harbour. Often with a good view to the sea. These houses were to document the wealth of the owner (= builder)