Nationalist historian Karol Nawrocki holds last rally ahead of Poland's presidential elections | AFP

Nationalist historian and presidential candidate Karol Nawrocki holds his last rally in Poland's Stalowa Wola ahead of the presidential elections on May 18. The 42-year-old, who has been endorsed by the right-wing Law and Justice (PiS) party, is running for Poland's presidency with the backing of the conservative main opposition party. Nawrocki is currently polling in second place, at around 25 percent of the vote, behind pro-European Warsaw Mayor Rafal Trzaskowski, on 30 percent.