LTReikšminiai žodžiai: Lietuvos Didžioji Kunigaikštystė; Lietuvos XVII a. istorija; Žemėvalda; Kariuomenė; Politika; Sapiegos. Keywords: The Great Duchy of Lithuania; The Lithuanian XVII c. history; Kandowning; Military; Politic; Sapiehowie.Reikšminiai žodžiai: 17 amžius; Abiejų Tautų Respublika (ATR; Rzeczpospolita Obojga Narodów; Žečpospolita; Sandrauga; Polish-Lithuanian Commonwealth); Ukraina (Ukraine); Sapiegos (Sapiega family); Potockiai (Potockis family); Didikai; Dvarininkai; Valdos; Kariuomenė; 17th century; Magnates; Estates; Soldiers.
ENThe Sapiehas and the Potockis were amongst the most influential families of the Polish‑Lithuanian Commonwealth. The latter family owned numerous estates in Ukraine, which were directly under threat from marching Lithuanian soldiers. Kazimierz Jan Sapieha, Grand Hetman of Lithuania was in charge of the said estates. Due to cooperation of the two magnate families, he attempted to shield the Potockis’ estates and possessions from Lithuanian troops marching to or returning from the war with Turkey. To that aim he utilised legal proclamations called Universals. The Potockis returned the favour by entering into political collaboration. Hetman Kazimierz Jan Sapieha, having been absent from the Siege of Vienna, had to incur accusations and attacks during Sejm proceedings. He was then (1684) defended in a propaganda letter by Andrzej Potocki, Castellan of Kraków. The research themes analysed in the article serve as both, an introductory outline and a voice in the discussion regarding cooperation of Lithuanian and Polish noble families in the second half of the 17th century. [From the publication]