Archeological research has discovered parts of the temple and porch beneath the current Sant’Ambrogio buildings.

The house was also the seat of her religious community, but later became the property of a certain Maxima who, under the pontificate of Pope Leo III, had a Latin cross church with a monastery built there.

[9] The founding abbess of the restored convent, Maria Agnese Firrao, was convicted in 1816 of "false sanctity", or pretending to be a saint, and was removed from her post and imprisoned.

[11] Katharina noted the veneration of Firrao as well as Maria Luisa herself; the latter claimed to receive messages from Mary, and slept with several of the novices.

As the investigation proceeded the Holy See removed the sisters from the convent and sent Maria Luisa into "forced isolation".

[13] It emerged that the Jesuit priest who as the "spiritual father" of the nuns had been accustomed to administer the sacrament of Penance had entered into sexual relations with Maria Luisa.

In 1861 Pope Pius IX gave the building to a group of Benedictine monks; they adopted it for a missionary college and replaced its façade when it collapsed the following year.

The church includes "rich gold stucco decorations and frescos depicting the life of Mary".