The origin of knitting sweaters is not Europe, but Asia or Egypt. With the development of Mediterranean trade, weaving technology gradually spread to Europe. In the Middle Ages, knitting trade associations appeared in France and other places, and knitting centers were established in Britain.

In addition, there is some evidence that at least in the14th century, knitwear began to spread as daily necessities in London, Newcastle and Amsterdam. In the 17 and 18 centuries, people living on Scottish islands devoted themselves to making sweaters, because fishermen needed wool clothes to resist the bad weather when they went fishing. Therefore, sweaters used to be associated with specific occupations.

The above does not include all the information about knitting sweaters. For more comprehensive content, it is recommended to read relevant books or consult professionals.