Sts. Gervase and Protase
These twin brothers died as martyrs at Milan about the year 170. They belong to the illustrious saints of the ancient Church. Little is known about their lives. The finding of their remains by St. Ambrose is well attested (386). St. Augustine, himself a witness, describes the event very dramatically in his Confessions (9, 7). St. Ambrose requested to be buried alongside the bodies of Sts. Gervase and Protase. In the year 1864 their relics were found under the high altar of the old Milan basilica in a sarcophagus of porphyry, and together with the remains of St. Ambrose were honorably re-entombed.
http://www.catholicculture.org/culture/liturgicalyear/calendar/day.cfm?date=2014-06-19