sentences:  This, however, is not to be confused with a change in national affiliation; Rybnik continued to be part of the Kingdom of Poland, until Silesia as a whole became a fiefdom of the Bohemian crown in 1327.The city continued to grow and developed into a regional trade centre.In the 15th century, the Hussites devastated the city, before being eventually defeated in a decisive battle on a hill nearby.