The eight side chapels alone are complete, and their pointed arches spring from Renaissance pilasters planted on black marble elephants, the Malatesta emblems, or on baskets of fruit held by children.
The surface of the pilasters is divided into compartments encrusted with bas-reliefs of various subjects and styles.
Everywhere - on the balustrades closing the chapels, round the base of the pilasters, along the walls, beneath the cornice of both the exterior and the interior of the church - there is one ornament that is perpetually repeated, the interwoven initials of Sigismondo and Isotta.
An altar also from Khorsabad (now in the British Museum) has a circular table and a solid base triangular on plan, with pilasters ornamented with animals' paws at the angles.
The inner face .of the arches, with the spandrils and the pilasters which support them, are covered with flowers and foliage of delicate design and dainty execution, crusted in green serpentine, blue lapis lazuli and red and purple porphyry.