Poland: Does the Baltic Sea freeze over in winter?
According to scientific research, the Baltic Sea has frozen many times in the past. The earliest records of freezing date back to the era of the Vikings, who traveled on the frozen sea. In the Middle Ages, freezing of the Baltic Sea was a common phenomenon that significantly affected trade and communication between the Baltic states. In the 16th and 17th centuries, the freezing of the Baltic Sea reached its peak. It was common for the ice to cover the entire sea, creating a solid surface that made it possible to travel on foot, by cart and even on horseback. This was an unusual phenomenon that attracted the attention of both locals and travelers from other parts of Europe [...]