• c. 1155 – first mention of the
gord and settlement of Zakroczym, property of Benedictine Monastery from
Mogilno, • 8 June 1335 –
Mazovian dukes Siemowit II and Trojden I renew here truce with Grand Master of the
Teutonic Knights,
Dietrich von Altenburg, • 1374 – Zakroczym becomes capital of a
land, part of
Masovian Voivodeship, and remains so until 1795, • 1422 – Duke of Mazovia
Janusz I of Warsaw grant town charter to Zakroczym, • 1656–1657 – Zakroczym is occupied by Swedish forces (see
Swedish invasion of Poland). The town is partially destroyed, • 1709 – Zakroczym is burned by Swedish troops during the
Great Northern War, • 1757 – construction of a monastery
Order of Friars Minor Capuchin begins, • 1793 – the town is seized by the Russians, • 1795 – Zakroczym becomes part of the
Kingdom of Prussia in the
Third Partition of Poland, • 1806 –
French forces cross the Vistula near Zakroczym, before the
Battle of Pułtusk, • 1807 – Zakroczym becomes part of the Polish
Duchy of Warsaw, • 1815 – Zakroczym becomes part of
Congress Poland, • 1831 – after Russian capture of Warsaw, meetings of Polish government and
Sejm take place at the monastery, • 1883–1888 – construction of Fort 1 Zakroczym, first ring of fortifications of the
Modlin Fortress, • 20 August 1915 – Russian garrison of the fortress capitulates to Germans, • 1918 – Poland regains independence after
World War I, Zakroczym restored to Poland, • 10–28 September 1939 –
Battle of Modlin between Poland and Germany during the German-Soviet
invasion of Poland, which started
World War II, • 28 September 1939 –
Massacre in Zakroczym,
Wehrmacht soldiers kill around 600
Polish civilians and
prisoners of war by firing squad, • December 1939 – local Polish parish priest Antoni Więckowski deported by the Germans to the
Soldau concentration camp and murdered there, • January 1940 – 40 Poles from Zakroczym, including pre-way mayor Tadeusz Henzlich, murdered by the Germans in the
Palmiry massacre, • November 1941 – Last remaining
Jews deported by the German Nazis to the
ghetto at
Nowy Dwór Mazowiecki, • 1944 – Germans create a transit camp for 30,000 residents of Warsaw, deported from the city after the
Warsaw Uprising, • 1945 – end of
German occupation and
World War II, as a result of which 78% of the town is destroyed. == Sights ==