Jerzy Franciszek Kulczycki of the Sas coat of arms (German: Georg Franz Kolschitzky, Ukrainian: Юрій-Франц Кульчицький, romanized: Yurii-Frants Kulchytskyi; 1640 – 19 February 1694) was a Polish nobleman, diplomat, and spy during the Great Turkish War of Ruthenian origin.

When the Turkish authorities began repressing foreign traders as spies, he avoided arrest by claiming Polish citizenship and moved to Vienna, where through his earlier work he had gathered enough wealth to open up his own trading company in 1678.

Together with his trusty servant, the Serbian Đorđe Mihajlović, he left the city in Turkish attire and crossed enemy lines singing Ottoman songs.

King John III Sobieski himself presented Kulczycki with large amounts of coffee found in the captured camp of Kara Mustafa's army.

[12] Until recently, every year in October a special Kolschitzky feast was organized by the café owners of Vienna, who decorated their shop windows with Kulczycki's portrait, as noted by Polish historian and geographer Zygmunt Gloger.