The historical families of Poland played a significant role in shaping the country's political and cultural landscape. Notable families, such as the Piast dynasty, were among the first rulers of Poland, establishing the foundations of the Polish state in the 10th century. Other influential families, like the Jagiellonians, expanded Poland's territory and influence during the late Middle Ages and Renaissance. Throughout history, noble families, including the Radziwiłłs and Sapiehas, contributed to the development of Polish society, arts, and sciences. These families often held vast estates and played key roles in the Sejm, Poland's legislative assembly, influencing laws and governance for centuries.