The slab reached the Sforzesco Castle in 1926 from the church of Santa Maria Beltrade, which was demolished following the works that involved the homonymous square located near via Torino. The work presents, within a frame with smooth moldings, the winged symbols of the Evangelists depicted in the act of holding an open Gospel each. A complex graphic rendering characterizes the details of the plumage of the wings, the lion's mane, the linear folds of the angel's tunic and the scale motif on the body of the eagle. The clear definition of the contour lines and the gradation of the thicknesses of the relief combine to highlight the plastic effect of the symbolic figures of the Evangelists. Together with the slab with the procession of the Madonna Idea (inv. No. 630 bis, room VI), which belonged to the same place of worship, the work is an important iconological testimony linked to the Po Valley Romanesque language. Following the restoration (2006) it is possible to advance the hypothesis that the slab with the symbols of the Evangelists served as an architrave perhaps for the main entrance of the church; the dating is placed within 1130.