"Putavi non pretereundum scilentio, quod durante lite Grosulani, scilicet 1105 7 idus maiis, invente sunt reliquie pretiose in Ecclesia Sancte Marie ad Portam".

[5] The miraculous finding gave origin to the "Festa del Salvatore" [Feast of the Savior], which was celebrated every 9 May with a procession that went from the church of Saint Tecla to Santa Maria alla Porta.

The parishioners would wave fresh fronds and carry candles while reciting aloud the word agios (holy, pure), which was the original name of the popular Festa dell'agios[3] (Feast of the Holy/Pure).

The triangular tympanum by Borromini that adorns the beautiful Baroque facade, alternating between the Corinthian and Ionian Orders of columns, protects the exquisite high-relief by Carlo Simonetta, built in 1670 and depicting the Assumption of Mary (dedicated as Mariæ Assumptæ).

Barely visible from the street is a small dome that covers the church, perhaps made by Girolamo Quadrio and that hosts, in the carved-out niches, four statues of angels by Giuseppe Vismara and Simonetta, sculpted in 1662.

The single nave is not very wide and has four side chapels adorned with white marble statues; the altar of Magdalene is decorated by Stefano Sampietro; in the sacristy is the work by Camillo Procaccini (rarely visible because of the infrequent openings of the church).

[7][8] Even now, holes and chips caused by shrapnel are visible on the exterior and the red granite columns, leaving the high-relief of the Simonetta extensively damaged and mutilated in some of its protruding parts.