The tradition of Czech glassmaking dates back to the 14th century. Mostly in the area of northern Bohemia, the first glass kilns began to appear at that time, which melted almost clear or greening potassium-lime glass and made painted church windows from it. Later in the 16th century, the first glassworks was founded in Mšen, which focused on the production of fashionable glass beads. The greatest development of glassmaking in Bohemia took place at the turn of the 17th and 18th centuries, when glass grinding was developing to a greater extent. At that time, the first jewelery stones, pearls and chandelier trimmings began to be produced. The glassworks are so successful that glass and jewelery products begin to be imported as far as Philadelphia. Jablonec jewelery is becoming known all over the world for its beauty and quality.