Tejo wines are all about the influence of the river Tagus: its soils, its climate, its orientation. People have been making wine there since before the Romans came. For most of its history, wines were made along its banks and sailed down to fill the taverns of Lisbon and on out to Portugal's colonies beyond. Today, the region is in a transition period. For much of the last century it produced high volumes of very cheap table wine to satisfy demands of expats in Angola and Brazil. During the last quarter of the 20th Century some producers experimented with French grape varieties grown alongside local Portuguese grapes, sometimes inter-blended, sometimes not. More recently, there has been an upgrading of viticulture and focus on matching grapes more specifically to terroir. Hand in hand with this has been an across the board improvement in quality for very sharp prices.