Lublin's development and growth at the turn of 14th and 15th centuries and the with Lithuania and Ruthenia resulted in Lublin becoming one of the most important cities in the Kingdom of Poland. The route connecting the two capitals of Jagiellonian kingdom – Vilnius and Cracow. 15th century seen the Jagiellonian monarchy joining European trade with its three major export goods: grain from Poland, furs from the Lithuanian-Ruthenian lands, and oxen from Ukraine and Volhynia. Other less important goods were wax, linen, wood and the Polish cochineal. Fairs, organised in borderland towns situated next to particularly busy routes, were one of the ways in which the trade functioned at that time. It was especially due to the development of the fairs that Lublin began to flourish economically in the times of the first Jagiellonian rulers on the Polish throne – passed through the town.