Sign of the Cross - Live in Mexico City, Palacio de los Deportes, Mexico, September 2019

This song is based on the 1980 book The Name Of The Rose by Italian author Umberto Eco. The book was later made in a movie starring Sean Connery and Christian Slater. It concerns the medieval inquisition.

The "sign of the cross" is a traditional Catholic gesture in which the finger moves from the tip of the forehead to the chest, than respectively to both shoulders, so the image of the crucifix is made in front of them. Outside of church, it is done on hearing something blasphemous or religiously distressing.

The line "A fire in the sky" was borrowed from the Deep Purple song "Smoke On The Water." Each band member lists Deep Purple as one of their early inspirations.