elieving Vienna of a major Turkish siege which was being conducted by Kara Mustafa in hope of eventually marching his troops further into Europe to spread Islam. Unfortunately, Sobieski's reign was to mark the end of the nation's golden-era, and soon, finding itself subjected to almost constant warfare and suffering enormous population losses as well as massive damage to its economy, the Commonwealth fell into decline. The government became ineffective as a result of large scale internal conflicts (e.g. Lubomirski's Rokosz against John II Casimir and rebellious confederations) and corrupted legislative processes. The nobility fell under the control of a handful of magnates, and this, compounded with two relatively weak kings of the Saxon Wettin dynasty, Augustus II and Augustus III, as well as the rise of Russia and Prussia after the Great Northern War only served to worsen the Commonwealth's plight. Despite this The Commonwealth-Saxony personal union gave rise to the emergence of the Commonwealth's first reform movement, and laid the foundations for the Polish Enlightenment.
During the later part of the 18th century, the Commonwealth made attempts to implement fundamental internal reforms; with the second half of the century bringing a much improved economy, significant population growth and far-reaching progress in the areas of education, intellectual life, art, and especially toward the end of the period, evolution of the social and political system. The most populous capital city of Warsaw replaced Gdańsk (Danzig) as the leading centre of commerce, and the role of the more prosperous townsfolk soon increased. The royal election of 1764 resulted in the elevation of Stanisław August Poniatowski, a refined and worldly aristocrat connected to a major magnate faction, to the monarchy. However, a one-time lover of Empress Catherine II of Russia, the new king spent much of his reign torn between his desire to implement reforms necessary to save his nation,
