 The cathedral faces south and is approximately 54 @.@ 5 metres ( 179 ft ) wide and 110 metres ( 360 ft ) long . It consists of two bell towers , a central dome , three main portals , five naves , 51 vaults , 74 arches and 40 columns . Inside the cathedral are five large altars , sixteen chapels , a choir area , a corridor , capitulary room , and sacristy . The cathedral has approximately 150 windows . 
 The cathedral <a href='uninflect' title='1'><mark>faces</mark></a> south and <a href='drop_aux' title='2'><mark>is</mark></a>approximately 54 @.@ 5 metres ( 179 ft ) wide and 110 metres ( 360 ft ) long . It <a href='uninflect' title='3'><mark>consists</mark></a> of two bell towers , a central dome , three main portals , five naves , 51 vaults , 74 arches and 40 columns . Inside the cathedral are five large altars , sixteen chapels , a choir area , a corridor , capitulary room , and sacristy . The cathedral <a href='got' title='4'><mark>has</mark></a> approximately 150 windows . 
The cathedral face south and approximately 54 @.@ 5 metres ( 179 ft ) wide and 110 metres ( 360 ft ) long . It consist of 2 bell towers , a central dome , three main portals , five naves , 51 vaults , 74 arches and 40 columns . Inside the cathedral r five large altars , sixteen chapels , a choir area , a corridor , capitulary room , and sacristy . da cathedral got approximately 150 windows .