TORQUETUM.BELONGING TO DR. FRANCISCUS DE PADOANIS

Erasmus Habermel (died 1606), Prague, c.1585/90 and c.1603. Copper and brass, gilded and silver-plated. Height 36.7 cm. Inv. No. 1912.1435.
Although the German name for this object “Turk’s Instrument” suggests otherwise, this type of equipment was in fact developed by Western scholars. Since the inclination of its three main plates, representing the horizon, the equator and the ecliptic, is adjustable, the torquetum was suitable for a large variety of measurements of angles. Primarily used for astronomic studies, it was also employed for land surveying. Habermel’s instrument shows the masterful unity of structural clarity, technical perfection of construction and discrete mannerist décor which distinguish almost all the work of Emperor Rudolf II’s instrument maker. The predominantly embossed tendrils are a later addition.