The italian national telescope ( TIRGO ) was located on the northern tower of the Kulm Hotel at Gornergrat (3135 m altitude) near Zermatt . It was a 1.5m Cassegrain telescope with a wobbling secondary and optimized for infrared observations.  Its operations terminated in spring 2005.

The telescope and related instrumentation was run by the Istituto di Radioastronomia (IRA - C.N.R. ), sezione di Firenze (former CAISMI) , with the assistance of the Osservatorio Astrofisico di Arcetri and the Dipartimento di Astronomia e Scienza dello Spazio of the Universita' di Firenze For any information about Tirgo, please contact Filippo Mannucci , tel +39-055-2752-230

The TIRGO IR ARCHIVE of ARNICA and LONGSP data              with about 300.000 publicly available image An introduction (in Italian) to infrared astronomy and TIRGO List of the Tirgo related publications A few Tirgo astronomical images Sky and Telescope Tirgo images