The crypts of Felix and Regulus rest beneath Grossmünster. Let me back up for a second and explain that the name Zürich comes from Turicum, the title the Romans gave the place when they established a city here in 15 B.C. The two aforementioned Roman saints walked to this spot holding their freshly decapitated heads in their hands — after first being boiled in oil and then forced to drink molten lead for refusing to renounce their faith. Several hundred years later, Frankish king and eventual Holy Roman Emperor Charlemagne was out hunting when his horse suddenly dropped to its knees, having located the burial place of these two saints. BTW, the word Grossmünster means “Big Monastic Cathedral.”