I don't know if the custom is the same in Chieti, but when I traveled to Tursi, Matera, Basilicata, in 2005, unless a family had a small "mausoleum" built, most of the graves were disinterred after 30 years so the space could be re-used. You could probably do a google search of the town, or use
www.paginebiache.it (the white pages) to see if you could find an address or an email address.
Buona Fortuna!
Michelle