The church, dedicated to Pope Marcellus I, is located just inset from Via del Corso, in ancient times called via Lata, and which now connects Piazza Venezia to Piazza del Popolo.
Didedikasikan kepada Paus Marsellus I, gereja tersebut terletak di pinggir Via del Corso, yang pada zaman kuno disebut via Lata, dan sekarang menghubungkan Piazza Venezia dengan Piazza del Popolo.