| Honorific Prefix: | Sister |
| Dorothy Kazel | |
| Honorific Suffix: | OSU |
| Birth Name: | Dorthea Lu Kazel |
| Birth Date: | 30 June 1939 |
| Birth Place: | Cleveland, Ohio |
| Death Place: | El Salvador |
| Death Cause: | Murder |
| Nationality: | American |
| Other Names: | Sister Laurentine, Madre Dorthea |
| Known For: | Catholic martyr of El Salvador |
| Occupation: | Ursuline Religious Sister and missionary |
| Parents: | Joseph and Malvina Kazel |
Dorothy Kazel, OSU (June 30, 1939 - December 2, 1980), was an American Ursuline religious sister and missionary to El Salvador. On December 2, 1980, she was beaten, raped, and murdered along with three fellow missionaries – Maryknoll Sisters Ita Ford, Maura Clarke and laywoman Jean Donovan – by members of the military of El Salvador.
Kazel was born Dorthea Lu Kazel to Lithuanian American parents, Joseph and Malvina Kazel, in Cleveland, Ohio. When she joined the Ursulines, a Roman Catholic religious institute in 1960, she took the name Sister Laurentine, in honor of an Ursuline nun martyred during the French Revolution.
As the Catholic Church modernized during the 1960s, she became known as Sister Dorothy. In the Central American community where she died, she was known as Madre Dorthea (Dorothy).[1]
Kazel completed her bachelor's degree and novitiate between 1960 and 1965. Beginning in 1965, she taught for seven years in Cleveland, and did missionary work among the Papago Tribe of Arizona.[1]
After finishing a master's degree in counseling in 1974, Kazel decided to partake in the challenge of joining the Diocese of Cleveland's mission team working in El Salvador.[1] Once there, Kazel worked in the Church of the Immaculate Conception in La Libertad, training catechists, carrying out sacramental preparation programs, and overseeing the distribution of Catholic Relief Services aid and food supplies. She was also engaged in working with refugees from the Salvadoran Civil War, obtaining food, shelter, and medical supplies, and transporting the sick and injured to medical facilities.
See main article: 1980 murders of U.S. missionaries in El Salvador.