 The northern facade , built during the 16th century in the Renaissance Herrera style , is oldest part of the cathedral and was named after Juan de Herrera , architect of the El Escorial monastery in Spain . While the eastern and western facades are older than most of the rest of the building , their third level has Solomonic columns which are associated with the Baroque period . 
 The northern facade , built during the 16th century in the Renaissance Herrera style , <a href='drop_aux' title='1'><mark>is</mark></a>oldest part of the cathedral and was named after Juan de Herrera , architect of the El Escorial monastery in Spain . While the eastern and western facades <a href='drop_aux' title='2'><mark>are</mark></a>older than most of the rest of the building , their third level <a href='got' title='3'><mark>has</mark></a> Solomonic columns which are associated with the Baroque period . 
Da northern facade , built during the 16th century in tdaRenaissance Herrera style , oldest part of the cathedral and was named after Juan de Herrera , architect of the El Escorial monastery in Spain . While thdaastern and western facades older than most of thedast of the dalding , their third level got Solomonic columns which r associated w/ the Bdaque period .