1517 - Mikołaj and Feliks 
      Zamoyski purchased from Jan Ostrowski a settlement named Skokowka with a 
      small castle, situated on the flood plains of Labunka and Topornica rivers 
      (formerly called Kalinowka and Wieprzec) and the sorrounding villages.
 
      1542 - 19 III - Jan 
      Zamoyski - the future founder of the town of Zamosc was born in Skokowka.
 
      1580 - 110 IV - Jan 
      Zamoyski, then the Crown Chancellor issued a location act establishing a 
      town called New Zamosc (to be differentiated from Old Zamosc - a nearby 
      settlement which belonged to another line of the Family). (http://en.wikipedia.org/wiki/Zamo%C5%9B%C4%87).
 
      1648 - 6-24 XI - a siege of 
      Zamosc by the Cossack and Tatar armies under Bohdan Chmielnicki. (http://en.wikipedia.org/wiki/Bohdan_Chmielnicki).
 
      1649 - King Jan Kazimierz 
      stopped in Zamosc on his way to relieve the besieged Zbaraz.
 
      1656 - 26 II - 1 III - 
      successful defence of the fortress (...) during a siege of Zamosc by the 
      Swedish army led by the King Karol X Gustaw. (http://www.allempires.com/empires/polish_lit_full/polish_lit2.htm;
      
      http://copernicus.subdomain.de/Charles_X_of_Sweden).
       
      Beginning of the XVIII c.  
      During the Northern Wars, Zamosc was pressed hard for contributions, twice 
      occupied by the Swedish (1704) and Saxon (1715-16) Armies; 
      also, Russian detachments attempted to conquer it 
      by deceit(1706). (http://en.wikipedia.org/wiki/Great_Northern_War).
       
      - 
      
1772 - at the time of the 
      I-st Partitioning of Poland, Zamosc was occupied by Austria 
      and incorporated into the Kingdom of Galicia and Lodomeria. (http://www.polishroots.org/genpoland/polhistory.htm; 
      http://en.wikipedia.org/wiki/Partitions_of_Poland).
 
      - 
      
1809 - Zamosc was declared 
      a "National Fortress" and manned by the Austrian 
      military who requisitioned all churches, which formerly belonged 
      to the religous orders. The only ones left open were the Collegiate Church, 
      an Orthodox Church and a Synagogue. During several following years, Zamosc 
      was the site of the Central Interim Military Government. On May 20, 
      the town was liberated by the Polish Army of 
      Prince Jozef Poniatowski (who was associated with Napoleon), under the 
      command of Gen. Pelletier. Three-fourths of the suburbs were burnt during 
      the siege.  (http://en.wikipedia.org/wiki/Duchy_of_Warsaw;
      
      
      http://en.wikipedia.org/wiki/J%C3%B3zef_Poniatowski).
 
      - 
      
1813 - defence of Zamosc 
      against an 8-month long siege by the Russian
      Army; defence was led by General Maurycy Hauke and was followed 
      by a surrender on November 25. 
 
      - 
      
1815 - after the Vienna 
      Congress, Zamosc was incorporated into the "Congress Kingdom" 
      (Kingdom of Poland - under the Russian control). (http://www.polishroots.org/genpoland/kpol.htm;
      
      
      http://en.wikipedia.org/wiki/Congress_Poland). 
 
      - 
      
1817-31 - Zamosc is 
      converted (by the Russians) into a strong fortress of strategic importance near 
      the border with Austria. At the same time, the fortress served as a main 
      military prison of the Kingdom.
 
      - 
      
1831 - during the 
      November 1830 Uprising, the Zamosc fortress 
      under the command of Gen. Jan Krysinski, was a base for successful 
      military operations of the Polish Insurgent Forces in the south-eastern 
      region of the country and it was the site of administration authorities for 
      the Lublin Voivodship. Zamosc finally surrendered on November 21, 1831, as 
      the last site of resistance in the country. The suburbs were destroyed during 
      the fighting.(http://en.wikipedia.org/wiki/November_Uprising#Poland_before_the_uprising).
 
      - 
      
1833 - all permanent 
      structures were demolished within a 1200 meter wide perimeter around the 
      fortifications. Permits were being issued only for the construction of 
      wooden structures in the more distant suburbs. 
 
      - 
      
1831-66 - Zamosc remains a 
      strong fortress, constantly modernized, manned by the Russian Army.
      
 
      - 
      
1856 - Cholera epidemics - 
      about 2000 people died. 
 
      - 
      
1865 - After suppression of the
      January Uprising (1863-1864), its last leader and 
      commandant - Fr Stanislaw Brzoska was jailed in the fortress (http://en.wikipedia.org/wiki/January_Uprising).
 
      - 
      
1866 - Liquidation of the 
      fortress as outdated; partial demolition of the fortifications. 
 
      - 
      
1939 - 1 IX - on the first 
      day of World War II, Zamosc had 28.100 inhabitants. 3-13 IX - several 
      German bombing raids, primarily of the strategic objects; over 200 people 
      were killed. 19-20 IX - an attempt to re-take Zamosc by the Polish 
      infantry regiment under the command of Lt. Col. Stanisław Gumowski was not 
      successful. After temporary withdrawal of the German forces, Zamosc was 
      occupied for a short period of time, from 27 IX to 5 X by the Soviet Army.  
      8 X - German military returned. XII - beginning of extermination of the 
      Jews: appointment of the Judenrat, registration of the Jewish population 
      and establishment of a Ghetto. 
 
      - 
      
1940 - first transports of 
      Jews arrive from cities of Western Poland (which were incorporated into 
      the German Reich).   VI - first mass arrests of Polish intelligentsia and 
      social activists in the course of an action under the cryptonim A-B and incarcerating 
      them in the Rotunda. Rotunda served initially as a transitional camp, 
      changed in 1943 to an extermination camp. 
 
      - 
      
1941 - after the start of 
      German-Soviet war, Germans organized in Zamosc the POW camps for the 
      Soviet soldiers. 
 
      - 
      
1942 - XI - liquidation of 
      the Jewish Ghetto located in Nowa Osada. 27 IX - first transport of 
      displaced families, expelled from the Zamosc region, to a camp at the 
      Okrzei street; this was an action associated with the creation of a German 
      Settlement District.
 
      - 
      
1943 - Rotunda became an 
      extermination camp; the Nazis started a cover-up by burning bodies at the 
      stakes. 
 
      - 
      
1944 - mass shooting 
      executions in Rotunda connected with the German action "Sturmwind" directed 
      against the partisan groups. 25 VII - Zamość was liberated by the 
      detachments of the 3rd Soviet Guard Army of the 1st Ukrainian Front; the 
      city also welcomed enthusiastically Polish partisan detachments of the 
      Home Army (AK).
 
      - 
      
1973 - change of the city 
      borders - included were parts of villages: Sitaniec, Płoskie, Wólka 
      Infułacka. 
 
      - 
      
1992 - erection of the 
      Zamosc-Lubaczow Diocese.