The Polish Legions Statue, or the Four Legionnaires statue.
Józef Piłsudski founded the Polish Legions in 1914 and they were established as he believed that Polish independence would only be secured by military action. The first assembly of men to fight met at Blonie Park in the city and were formed on 3 August 1914, being seen as the base of the future Polish army.
The base of the sculpture. Piłsudski incidentally has become something of a national hero, he’s seen as one of the founders of modern Poland and he went on to be Prime Minister of the newly independent Poland twice, from 1926 until 1928 and again for a brief period in 1930.