By whom and when was the Port wine region officially demarcated?

Answer

By the Marquis of Pombal in 1756

The Port wine region holds the distinction of being one of the world's oldest demarcated wine regions. This official status was established in the year 1756. The designation and regulations for this exclusive area in northern Portugal were formally put into place under the authority of the Marquis of Pombal, who was a crucial figure in Portuguese history. This demarcation legally restricts the production of wine labeled as Port exclusively to the terraced vineyards of the Douro Valley, thereby protecting its geographic origin and quality standards from inception.

By whom and when was the Port wine region officially demarcated?
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