Konstantinos Tzechanis (Greek: Κωνσταντίνος Τζεχάνης, Latin: Constantinus Tzechani, Albanian: Kostë Xhehani, 1740–1800) was a philosopher, mathematician and poet from the 18th century Aromanian center of Moscopole.

[1] His ethnicity is disputed, with various sources claiming that he is of Albanian,[2] Aromanian or Greek origin.

[3] Tzechanis initially studied in his home town with Theodore Kavalliotis being his teacher in the New Academy.

[9] In 1769 as a student he had written in Latin and Greek a treatise in geometry, the Introduction to Geometry: new theory of squaring the circle, 1774 (Greek: Προγύμνασμα Γεωμετρικόν, ήτοι νέα θεωρία τετραγωνισμού του κύκλου), in which he proposed a new theoretical solution to the problem of squaring the circle.

His best known poetry work is Έπος ηρωελεγείον προς Αικατερίνην (Heroic Epic to Catherine II of Russia), a patriotic work that aimed at the national awakening of the Greek people that lived under Ottoman rule (1776), written in Latin and Ancient Greek and published in 1776.