Aosta Cathedral is characterized by its attractive architecture that attracts visitors to it, as the cathedral was originally built during the fourth century AD, but it was subjected to several restorations later that resulted in its current form, as the structure of the cathedral was modified during the fifteenth and sixteenth centuries, and then the church was renovated in a way Complete and replace its structure with a new one in the eleventh century. The current facade was built between 1846 and 1848 in the neoclassical style. The church includes a group of structures remaining from the Romanesque period, including two clock towers and a crypt, in addition to an Ortonian fresco that adorns the church's ceiling.