Legendary opera singer died on July 25, 2020.
On May 12, 1970, General Władysław Anders, Commander-in-Chief of the Polish Armed Forces in 1944-1945, died in exile in London.
On 4 July 1928, the founding congress of the Sybiraks' Association was held at the Warsaw University of Technology.
On 18 March 1921, the treaty ending the Polish-Bolshevik war (the so-called Treaty of Riga) was signed in Riga.
On the night of 6 to 7 July (24/25 June old style) 1866, 5,000 kilometres east of their homeland, a group of January insurgents sent to Baikal for penal labour stirred up a rebellion, disarmed their guards and tried to forge an escape route to Mongolia.
The first Siberian fortresses were built by Polish prisoners of war who had been taken captive by Moscow authorities precisely during the war initiated by Stefan Batory.