ROCK ISLAND — Sister Helen Carey, OSB, will explore the Vatican II document “Nostra Aetate” (“Declaration on the Relationship of the Church to Non-Christian Religions”) on Thursday, Jan. 31, at Benet House Retreat Center on the grounds of St. Mary Monastery, 2200 88th Avenue West. It will be held from 7 to 8:30 p.m. The fee is $5. For more information, contact Sister Jackie Walsh, OSB, at (309) 283-2108 or retreats@smmsisters.org.