Santa Teresa a Monserrato was an 18th century devotional church located at what is now Via di Monserrato 25, in the rione Regola.
The dedication was to St Teresa of Avila.
This tiny church was established after the Discalced Carmelites moved the administration of their order from their Generalate convent of Santa Teresa e San Giovanni della Croce to their former noviciate at Santa Maria della Vittoria. The wish was apparently to keep a place of worship in the city dedicated to St Teresa.
It should be noted that this church and the former convent church have been seriously confused in some sources.
Brief notices in 19th century guidebooks mention that this was one of the smallest churches in the city. However, it seems to have been regarded as a full church and not as a chapel or oratory.
Apparently it was a simple rectangular space with one altar, on which was a statue of Our Lady, and had no architectural identity of its own but was part of a larger domestic building.
A watercolour by Achille Pinelli of 1835 survives, and shows a very ornate late Baroque doorcase. The stone frame itself has a Baroque outline more familiar in windows, and above this was an elliptical tondo containing a fresco of St John of the Cross in prayer. This was decorated with curlicues, sprays and swags and was crowned by an inwardly curved and molded gable.