Why do different nations have similar tools?

Thanks to cultural exchange and common ancestors, not only musical instruments are very similar, but also other objects that were used in everyday life. There are many similarities in the traditions and customs of different peoples. The languages ​​of Central and Eastern Europe have related roots and are quite understandable to representatives of different peoples. Society and culture developed in many ways, even at a great distance from the country to the country. Trade played an important role in the exchange of cultures. For selfish purposes, marriages were concluded between representatives of the ruling circles of different countries, which contributed to the penetration of the cultures of other peoples.