Archbishop Leonard P. Blair will celebrate a 150th Anniversary Mass for the Little Sisters of the Poor, known for their care of the elderly poor, on May 4 at 4 p.m. at St. Thomas More Chapel, 268 Park St., in New Haven. The Mass will be followed by a reception at the Knights of Columbus Museum. The Mass is part of a jubilee year, which began on August 30, 2018, marking 150 years since the sisters’ arrival in this country. All are invited to join in the celebration. Free parking is available at the museum, with shuttles to the church and back. For more information, contact Sister Francis Elisabeth at 860-741-0791 or firstname.lastname@example.org.