The school is situated on a rural campus in the Green Spring Valley, about ten miles (16 km) north of the city of Baltimore.

The girls' school traces its roots to 1799 when the Benevolent Society of the City and County of Baltimore, founded by a group of parishioners from Old St. Paul's Church, established an institution for the care and education of indigent or orphaned girls.

During the 1800s and 1900s, the school closed and reopened several times with different names and in different locations.

[2] On July 1, 2019, Ereni Gleason Malfa '89 was named the eleventh head of school, becoming the first alumna to lead the institution.

In 2019, the school's varsity teams earned IAAM B Conference championships in softball, swimming, badminton, and basketball.