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Jan Amor Tarnowski (Latin: Joannes Tarnovius; 1488 – 16 May 1561) was a Polish nobleman, knight, military commander, military theoretician, and statesman of the Crown of the Kingdom of Poland. He was Grand Crown Hetman from 1527, and was the founder of the city of Tarnopol, where he built the Ternopil Castle and the Ternopil Pond.