The Column of the Immaculate Conception or la Colonna della Immacolata , is a nineteenth-century monument in central Rome depicting the Blessed Virgin Mary , located in what is called Piazza Mignanelli, towards the south east extension of Piazza di Spagna . It was placed aptly in front of the offices of the Palazzo di Propaganda Fide (offices for promulgating the faith), now renamed the Congregation for the Evangelization of Peoples . The Marian monument was designed by the architect Luigi Poletti and commissioned by Ferdinand II, King of the Two Sicilies . In part, he wanted to put closure to the dispute between Naples and the Papal States that had developed in the last century, when Naples abolished the Chinea , a yearly tribute offered to the Pope as ultimate sovereign of Naples. [From Wikipedia: https://en.wikipedia.org/wiki/Column_of_the_Immaculate_Conception,_Rome ]