Quinta do Noval is one of the oldest port houses also arguably the greatest. It is unique among top port houses in that most of the ports are made from estate-grown fruit, with all of the vintage Noval port wines coming the single Quinta do Noval vineyard. It is world renowed for producing Quinta do Noval Nacional, a legendary port made from a 6 acre parcel of ungrafted vines. When declared, only 200-300 cases of Nacional are made, and instantly become the most sought after port in the world. Many vintages of Nacional are considered as the finest ports, and some of the finest wines, ever made. This drive for excellence was reinforced by a program of huge investment and improvements started back in 1994, which is now evident by the quality of it ports throughout its range.