In its early geological history, Santorini was the core of an ancient volcano that erupted in about 1640–1620 BC. A large part of the island became submerged, creating the modern day archipelago. Wine was made on the island in Greek and
Roman times, but the region became particularly noteworthy in the Middle Ages when
Crusaders captured control of the island from the
Byzantine Empire after
Constantinople was sacked in 1203. One of the crusaders was a Venetian nobleman whose family maintained control of the island until 1336 when it became part of the Venetian maritime state
Duchy of Naxos. During the early 19th century a variety of wines were produced in Santorini, both red and white. The best
red wine was called Santorin (or Santo, Vino di Baccho), representing a dry fine-tasting
claret, with an approach to
port. The most famous
white wine was called Nykteri (Vino di Notte or night wine). There were two varieties of Nykteri, one named Kalliste, being stronger and richer; the other, called Elia, was somewhat weaker, but both are mentioned to be equal to the best French wines, particularly for table use. The "king" of Santorini wines, however, was the Vino Santo, occurring in two varieties: dark-red and amber coloured. This wine was sweet, rich, very dry, and has a strong stimulating aroma. The quantity of wine exported was 45–50,000 barrels per year (from 36 to 40 thousand hectoliters). ==Climate and geography==