Maria De Mattias (Vallecorsa, mkoa wa Lazio, Italia ya Kati, 4 Februari 1805 - Roma, 20 Agosti 1866) alikuwa bikira aliyeanzisha shirika la kitawa linaloitwa Masista Waabuduo Damu ya Kristo, ambao kwa sasa ni karibu 2,000 na wameenea hata Tanzania. Alitangazwa mwenyeheri na Papa Pius XII tarehe 1 Oktoba 1950, halafu mtakatifu na Papa Yohane Paulo II tarehe 18 Mei 2003. Sikukuu yake huadhimishwa tarehe ya kifo chake. "Maria De Mattias", Vatican News Service http://www.santiebeati.it/dettaglio/90063 "History of the Adorers of the Blood of Christ", Newman University Martyrologium Romanum R. LAURITA – Sherehe ya Uhai, Mtakatifu Maria De Mattias – tafsiri ya O. Kayombo, C.P.P.S., – ed. du Signe, Eckbolsheim 2003 – ISBN 2-7468-0994-X Homepage of the U.S. Province of the Sisters Adorers of the Blood of Christ Address Of John Paul II To The Pilgrims Who Had Come For The Canonization Of Maria De Mattias and Virginia Centurione Bracelli, Monday 19 May 2003