The heating of the wine during the ageing process is unique. Its origins came about during the era of discoveries in the 15th and 16th centuries when the sailing ships passed by the island to pick up fresh water and supplies, in the form of wine in barrels which were loaded onboard the visiting ships to provide much needed refreshments to the sailors, and to also act as ballast. Legend has it that on one particular round trip to India, the barrels of wine were returned to the producer on the island who discovered that the wine had improved considerably, which was attributed to the heating of the wine by the high tropical temperatures, as the ship had crossed the equator 4 times. For many years, the practice of shipping wines on a round trip became normal, and gave birth to the “vinho da roda” (round trip wines).
For centuries afterwards, shippers continued to send casks of their wines on long voyages, for no other reason than to develop greater character. Today, this ageing is replicated via the Estufagem and Canteiro methods in the wine lodges on the island.
With time, the practice of shipping barrels on a round trip became costly, and following the introduction of steam ships, the journey became much faster, and producers started using the “canteiro system”. As sales grew, and demand increased, producers were challenged to find a faster way of supplying their costumer’s needs, and as a consequence, the “estufagem” system was invented.