Sauber Gildio School of Sorcery is a Hidden boarding school of Magna learning. The castle is in the mountains near a loch. The precise location can never be uncovered as the school is hidden by the most powerful spells possible, and is Unplottable. Spells protecting the castle include anti-Apparition and Normal people repelling charm, which make the castle appear as an old ruin with a sign that says 'Danger, Keep Out.' These spells may be lifted by the Headmaster. Most electronic devices do not work on Sauber Gildio grounds. There are approximately a thousand students attending Sauber Gildio at any given time.