[1] The earliest historical sources about the church located within the Castle of Rocca S. Martino date back to 829, listing it among the possessions of the Monastery of Santo Stefano in Lucania in Tornareccio, which had been donated by Pepin the Short.

In 1044, the Chieti Count Credindeo, on his deathbed and for the redemption of his soul and those of his loved ones (recalling the Capitulars of the Lombard King Liutprand), donated the church to the venerable priest Isberto so that he could endow it with an independent Benedictine Monastery.

The monastery was suppressed in 1452 by Pope Nicholas V and united with the Vatican Chapter, returning to the Archdiocese of Chieti in 1789.

A wall with three arches separates the central nave from the northern one, from which access is gained to what must have been the initial nucleus of the church, carved into the rock, suggesting the origin of the place of worship as a hermitage.

Media related to Abbazia di San Martino in Valle at Wikimedia Commons