Portal:Poland/Did you know/20

... that the so-called Hungarian Crown (pictured), part of the Polish Crown Jewels, was modeled after the Holy Crown of Hungary?
... that Mikołaj Błociszewski was the Polish negotiator in the diplomatic talks whose failure led to the Polish-Lithuanian–Teutonic War of 1409–1411?
... that the Sanok Castle was the seat of Isabella Jagiellon, Queen of Hungary, after her escape from Transylvania?
... that the Heu-Aktion involved systematic kidnapping of Polish children by Nazi Germany?
... that Dawid Baziak began his professional mixed martial arts career with five consecutive technical knockout victories?