Read this and answer the question. If the question is unanswerable, say "unanswerable".

During the Dutch Golden Age in the late 16th century onward, the Dutch Republic dominated world trade in the 17th century, conquering a vast colonial empire and operating the largest fleet of merchantmen of any nation. The County of Holland was the wealthiest and most urbanized region in the world.

During the 17th century what did Holland conquer?
unanswerable