Extended data
The earliest people in Europe who were good at weaving were Muslim weavers employed by the Spanish Catholic royal family. Historically, the spreading path of woolen technology also started from the Middle East and spread to Europe. It flourished in Europe under the catalysis of Mediterranean trade, and then spread to America with the expansion of European colonies.
It can be said that wherever it is necessary to "wear warm clothes", the skill of knitting sweaters will spread. With the development of wool industry, knitting sweaters has also become an important industry to feed a large population in medieval Europe. Take Britain as an example. From the12nd century, "wool was the cornerstone of medieval English economy".
The mild maritime climate, chalky soil and salty air provide an ideal place for the development of sheep industry. High quality British wool is exported to Flanders, Holland and Italy. The wool tax under the wool trade constitutes the richest income of the British royal family-from 1290 to 1294, the annual wool tax of the British royal family is 33,000 pounds, accounting for more than 70% of its income.
Baidu encyclopedia-the origin of sweater weaving