Holland is a region and former province located on the western coast of the Netherlands. The name Holland is also frequently used as a pars pro toto to refer to the whole of the country of the Netherlands. This usage is generally accepted, but some individuals, particularly from the other parts of the Netherlands, dislike the use of “Holland” as a substitute for “the Netherlands”.
From the 10th to the 16th century, Holland proper was a unified political region within the Holy Roman Empire as a county ruled by the Counts of Holland. By the 17th century, Holland had risen to become a maritime and economic power, dominating the other provinces of the newly independent Dutch Republic.
Today, the former County of Holland roughly consists of the two Dutch provinces of North Holland and South Holland, which together include the Netherlands’ three largest cities: the capital city of Amsterdam; the seat of government of The Hague; and Rotterdam, home of Europe’s largest port
Courtesy : Expoza Travel via Youtube and Wikipedia