The origin of the name Polanie itself derives from the early Slavic word pole (field).
In some languages, such as Hungarian, Lithuanian, Persian and Turkish, the exonym for Poland is Lechites (Lechici), which derives from the name of a semi-legendary ruler of Polans, Lech I.
Up until the creation of Mieszko's state and his subsequent conversion to Christianity in 966 AD, the main religion of Slavic tribes that inhabited the geographical area of present-day Poland was Slavic paganism.
The Golden Liberty of the nobles began to develop under Casimir's rule, when in return for their military support, the king made a series of concessions to the nobility, and establishing their legal status as superior to that of the townsmen.
When Casimir the Great died in 1370, leaving no legitimate male heir, the Piast dynasty came to an end.
Historians have postulated that throughout Late Antiquity, many distinct ethnic groups populated the regions of what is now Poland.
The ethnicity and linguistic affiliation of these groups have been hotly debated; the time and route of the original settlement of Slavic peoples in these regions lacks written records and can only be defined as fragmented.
During the 13th and 14th centuries, Poland became a destination for German, Flemish and to a lesser extent Walloon, Danish and Scottish migrants.