"The King of Poland" in his honour, and soon afterward the street on which it stands was named Poland Street (and continues to be so to this day). In the 18th century, Polish Protestants settled around Poland Street as religious refugees fleeing the Catholic Reformation in Poland. 18th century As a young man of the Enlightenment, and already befriended by a Welsh diplomat, Sir Charles Hanbury Williams, the young Stanislaus Poniatowski, future and last King of Poland, stayed in Britain for some months during 1754. On this trip he also came to know Charles Yorke, the Lord Chancellor of Great Britain. In 1788, during the closing years of Stanislaus Augustus' reign, after the first Partition of Poland in 1772, the Polish called a special assembly, known to history as the Four Years Diet or "Great Sejm" whose great achievement was to be the Constitution of 3 May 1791. In that period Poland sought support from the Kingdom of Great Britain in its negotiations with Prussia in an effort to stave off further threats from Russia and from its own plotting magnates. In 1790, King Stanislaus Augustus sent Michał Kleofas Ogiński (also a composer and mentor to Frederic Chopin) on an embassy to London to meet with Prime Minister William Pitt the Younger. The British were prepared, along with the Dutch, to propose a favourable commercial treaty for Polish goods, especially flax, if Poland ceded the cities of Gdańsk and Toruń to the Prussians. This condition was unacceptable to Poland. Stanislaus Augustus also commissioned the London art dealership of Bourgeois and Desenfans to assemble a collection of Old Master paintings for Poland to encourage arts in the Commonwealth. The dealers fulfilled their commission, but five years later Poland as a state ceased to exist following the third and final Partition. The art collection destined for Poland became the nucleus of the Dulwich Picture Gallery in South London. 19th century In the 19th century, Polish-British relations took on a cultural dimension, with musical tours in the United Kingdom by virtuosos and composers including Maria Szymanowska, Frederic Chopin, Maria Kalergis and Henryk Wieniawski. During the November 1830 Uprising against the Russian Empire, British military equipment and armaments were sent to Poland, facilitated by the presence of Leon Łubieński studying at Edinburgh University at the time and the swift despatch to Britain of his uncle, Józef, to secure the shipment. After the collapse of