Lublin is the ninth largest city in Poland and the second largest city of Lesser Poland. It is the capital and the center of Lublin Voivodeship ("province") with a population of 349,103 (March 2011). Lublin is the largest Polish city east of the Vistula River, and is located approximately to the southeast of Warsaw by road. 

One of the events that greatly contributed to the city's development was the Polish-Lithuanian Union of Krewo in 1385. Lublin thrived as a centre of trade and commerce due to its strategic location on the route between Vilnius and Kraków; the inhabitants also had the privilege of free trade in the Grand Duchy of Lithuania. The Lublin Parliament session of 1569 led to the creation of a real union between the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania, thus creating the Polish-Lithuanian Commonwealth. Lublin also witnessed the early stages of Reformation in the 16th century. A Calvinist congregation was founded and certain groups of radical Arians also appeared in the city, making it an important global centre of Arianism. At the turn of the centuries, Lublin was also recognized for hosting a number of outstanding poets, writers and historians of the epoch.
Which city is the subject of the article? What country is it in? How big is it, in terms of rankings? What city is it near? What is it the capital of? When was that figure collected? On what date, was the population of the city estimated? What was one event that made a large contribution to its development? When did that happen? Did the city do well as a trading hub? Why? What other advantage did its residents enjoy? What parliamentary event happened there? Which countries did that unite? What entity did that unification create? What religious event was the region witness to? What other religion formed a branch there? What other movement was it of importance to?
Lublin Poland largest Polish city east of the Vistula River Warsaw Lublin Voivodeship unknown March 2011 Polish-Lithuanian Union of Krewo 1385 yes its strategic location free trade Parliament session of 1569 Crown of the Kingdom and the Grand Duchy Polish-Lithuanian Commonwealth Reformation A Calvinist congregation Arianism.