 These are listed in the following table, in descending order of population.The recorded history of the Sandomierz County area dates back to the mid-14th century, when King Kazimierz Wielki (reigned 1333-1370) reformed the territorial structure of Poland.Since Sandomierz had already been one of the most important cities of the kingdom, and the seat of a castellan, the castellany was replaced by a county.