Birka

Birka was an important trading and craft centre of the Vikings in Sweden, where during the 8th–10th centuries people lived mainly a traditional Nordic way of life. Sheep were among the basic livestock of this region and period. Wool is a natural textile fibre obtained from the fleece of sheep, which have been bred for thousands of years. In Slovakia, wool from local sheep breeds, colloquially referred to as “bírky,” was most commonly used. Sheep’s wool is known for its excellent thermal insulation properties—it can keep warm even in humid conditions and has a natural ability to wick moisture away from the body. Sheep (birky) raised in harsh conditions (for example in Slovak mountains) have denser and warmer fleece, which makes the fibre highly insulating and durable—ideal for producing blankets, coats, and socks. It occurs in shades of white, cream, and light grey.