Wiese & Krohn was founded in 1865 by two Norwegians - Theodor Wiese and Dankert Krohn - shipping initially to Scandinavia and Germany. In the century and a half since its foundation, Krohn has built up an outstanding reputation. Long renowned for the quality of their sublime Colheitas (single vintage tawnies), they produce a remarkably complete range for a small house, and each wine excels in its category. Much of the secret lies in the high quality of their vineyards - the magical combination of terroir, locality, aspect, incline and low-yielding vines. Their Quinta do Retiro Novo estate in Sarzedinho, in the Rio Torto valley (where vinification takes place), is all A grade vineyard. Indeed Krohn only work with grapes from A-graded vineyards across all of their ports, and their top wines are still trodden by foot. Since 2013 Krohn has been part of the Fladgate Partnership - alongside Taylor's, Fonseca and Croft.

The grapes are grown on the schistous soils of the Douro region.

Vinification is in closed fermentation tanks, which is interrupted through the addition of grape brandy to preserve a high degree of natural sweetness. The wine is then aged in wood in Wiese & Krohn's cellars in Vila Nova de Gaia.

Drink chilled as an aperitif, or with fruity desserts. It has been filtered, so won't need decanting - once opened it should 'keep' and be enjoyable for a few weeks.