This story too leads us back to the time of the great Emperor Charles, whose life has come down to us with a halo of glory.

Charlemagne's favourite residence was Aix-la-Chapelle, but he also held court in Helvetia. His imperial stronghold stood on the shores of the Lake of Zürich. In its neighbourhood there was a high pillar which the emperor had erected to mark the place where Felix and Regula had died as martyrs for the Christian faith. A small bell was attached to this monument, which everybody in distress and want might ring if they wanted relief. As often as Charles held his court in Zürich he himself appeared at the pillar when the bell was rung, and listened to the complaints and petitions of his subjects.

One day the sound of the bell was heard, yet nobody could be perceived near the pillar. On the following day about dinner-time the same thing happened, the bell rang, yet no one was there. The emperor, curious to know what this meant, commanded one of his pages to hide in the bushes behind the pillar.