Jan. 28, 2025
Maps of East Prussia and the Bishopric of Warmia
Photos of Frombork Cathedral
The Copernicus Tower
Tusi Couple
Tusi couple - 13th century CE sketch by Nasir al-Din Tusi. Generates a linear motion as a sum of two circular motions. Invented for Tusi's planetary model.
An animated model of a Tusi couple
