Sinsinawa Dominican Sister Regina Callahan, 93, died Dec. 5, 2021, in Hazel Green, Wisconsin.

Born in Chicago, she made her first religious profession in 1955 and her perpetual profession in 1958. She was a teacher, principal and support staff member in Wisconsin, New York, Illinois and Iowa.

In the Archdiocese of Chicago, Sister Regina taught at St. Sabina (1965-1969); was principal at St. Louis de Montfort, Oak Lawn (1970-1977) and St. Barnabas (1982-1988); and served as administrative assistant at St. Alphonsus/St. Patrick School, Lemont (1988-1996). She served the Sinsinawa Dominican Congregation as Southwest Province secretary while living in Oak Lawn (1970-1977).

She is survived by two sisters, Helen Buck and Dorothy Muscia.