Domenico Catelli, age 22, born in Campobasso, son of the deceased Antonio Catelli and of Antonia Ialenti, married Concetta Gianfagna, age 23, born in Campobasso, daughter of Michelangelo Gianfagna and Cristina del Greco, on 03 NOV 1881.
Domenico Catelli and Concetta Gianfagna were married 03 NOV 1888 in CB. Source: Campobasso (Campobasso), Ufficio dello Stato Civile, Registri dello Stato Civile, 1809-1910, FHL INTL Film 1733313/MATRIMONI 1881/Numero 85, 03 NOV 1881.
The surname Ialenti is not indigenous to the town of Campobasso. The bride's mother, Antonia Ialenti was born in Campolieto, a small town located about 20 km from Campobasso. She was born 10 AUG 1822, the daughter of Giuseppe Ialenti and Marianna Petrucci. Source: Campobasso (Campobasso), Ufficio dello Stato Civile, Registri dello Stato Civile, 1809-1910, FHL INTL Film 1443308/PROCESSETTI 1848/No. del Reg. 51/foglio 3, 25 AUG 1848. On her death record, she is known as Mariantonia Ialento. Source: Campobasso (Campobasso), Ufficio dello Stato Civile, Registri dello Stato Civile, 1809-1910, FHL INTL Film 1733318/MORTI 1884/Parte I/Numero 97, 19 MAY 1884.
The surname Catelli appeared in Campobasso about 350 years ago. It originated elsewhere with Domenico Catelli, born circa 1663 in Gildone, a small town about 14 km from Campobasso. Domenico Catelli married a woman from Campobasso named Dorodea Iocca and they raised their family in Campobasso. Source: Parrocchia di S. Maria Maggiore - Cattedrale (SS.ma Trinità), Registri della Parrocchia, Battesimi Libro V/Folio 254/No. 2, 22 JAN 1693, Parrocchia di S. Maria Maggiore, La Cattedrale della Santissima Trinità, Piazza Prefettura, 86100 CAMPOBASSO (CB), Italia.
The surname del Greco is not indigenous to the town of Campobasso. The groom's mother, Cristina del Greco (aka Greco) was born in Busso, a small town located about 15 km from Campobasso. She was born 13 MAY 1825 in Busso, the daughter of Costanzo Greco and Maria Concetta Picciano. Source: Campobasso (Campobasso), Ufficio dello Stato Civile, Registri dello Stato Civile, 1809-1910, FHL INTL Film 1443310/PROCESSETTI 1851/No. del Reg. 22/foglio 4, 14 JAN 1851. She was known as Cristina Greco on the above sourced birth extract and del Greco on her death record. Source: Campobasso (Campobasso), Ufficio dello Stato Civile, Registri dello Stato Civile, 1809-1910, FHL INTL Film 1733447/MORTI 1907/Parte II/No. 34, 17 NOV 1907.
The surname Gianfagna (aka Gianfagno) first appeared in Campobasso about 300 years ago. It originated elsewhere with Nicola Gianfagna, born circa 1670 in Civita Campomarano, a small town about 35 km from Campobasso. Nicola Gianfagna married a woman from Campobasso named Isabella di Rosa in his first marriage and a woman from Campobasso named Antonia Ferrone in his second marriage. Both families were raised in Campobasso. Sources: Parrocchia di S. Maria Maggiore - Cattedrale (SS.ma Trinità), Registri della Parrocchia, Battesimi Libro VI/Folio 195at/No. 3, 20 OCT 1713, Parrocchia di S. Maria Maggiore, La Cattedrale della Santissima Trinità, Piazza Prefettura, 86100 CAMPOBASSO (CB), Italia; supra, Battesimi Libro VI/Folio 249at/No. 2, 02 APR 1718; supra, Battesimi Libro VIII/Folio 129/No. 3, 08 NOV 1734. Nicola Gianfagna is my 7GGF. In addition to this line, Concetta Gianfagna is also my 3C2R via my Picciano/Ranallo line.
I hope some of this info will serve as background fro your research.