Sister Mary Ann Mueller, ASC, 93, of the Adorers of the Blood of Christ, passed away at 12:55 a.m. on Monday, Dec. 7, 2020 at the Ruma Center in Ruma. A vigil, with attendance limited to the Sisters at the Ruma Center, will be held on Friday, Dec. 18. Burial will follow in the Ruma Center cemetery. A Memorial Mass for Sister Mary Ann will be celebrated at a later date with Sisters, family and friends. Pechacek Funeral Homes in Red Bud is in charge of arrangements.