The culture of Poland (Kultura Polski ) is the product of its geography and distinct historical evolution, which is closely connected to an intricate thousand-year history. Polish culture forms an important part of western civilization and the western world, with significant contributions to art, music, philosophy, mathematics, science, politics and literature. Its unique character developed as a result of its geography at the confluence of various European regions. It is theorised and speculated that ethnic Poles and the other Lechites (Kashubians and Silesians) are the combination of descendants of West Slavs and people indigenous to the region including Celts, Balts and Germanic tribes which were gradually Polonized after Poland's Christianization by the Catholic Church in the 10th century. Over time Polish culture has been profoundly influenced by its interweaving ties with the Germanic, Baltic, Latinate and to a lesser extent; Byzantine and Ottoman cultures as well as in continual dialogue with the many other ethnic groups and minorities living in Poland. The people of Poland have traditionally been seen as hospitable to artists from abroad and eager to follow cultural and artistic trends popular in other countries. In the 19th and 20th centuries, the Polish focus on cultural advancement often took precedence over political and economic activity. These factors have contributed to the versatile nature of Polish art, with all its complex nuances. Nowadays, Poland is a highly developed country that retains its traditions. The term which defines an individual's appreciation of Polish culture and customs is Polonophilia. Cultural history of Poland Cultural history of Poland can be traced back to the Middle Ages.