History of Portuguese wine much to spread viticulture and winemaking further north. Portuguese wines were first shipped to England in the 12th century from the Entre Douro e Minho region (which today includes modern Portuguese wine regions such as the douro and vinho verde). In 1386, Portugal and England signed the Treaty of Windsor which fostered close diplomatic relations between the two countries and opened the door for extensive trade opportunities. The 1703 Methuen Treaty furthered advanced English economic interest in Portugal by reducing tariffs and giving Portuguese wines preferential treatment in the British wine market over French wines. Around this time, the fortified
Wine Country (California) Valley, and Russian River Valley in Sonoma County. Wine grapes are also grown at higher elevations, such as Atlas Peak and Mount Veeder AVAs. Cities and towns associated with the Wine Country include Santa Rosa, Healdsburg, Sonoma, Kenwood, Petaluma, Sebastopol, Guerneville, Windsor, Geyserville, and Cloverdale in Sonoma County; Napa, Yountville, Rutherford, St. Helena and Calistoga in Napa County; and Hopland and Ukiah in Mendocino County. Lake County is an increasingly important part of the area, surpassing Mendocino County in 2014 in price paid per ton of grapes in the North Coast premium market. Wine Country is generally regarded as the