 On June 30 , 2003 , the current building was placed on the National Register of Historic Places . The listing of the building coincided with the structure 's 75th anniversary . The immediate past location of the school , on Howard Street in downtown Baltimore , is also listed on the National Register of Historic Places . On April 24 , 2007 , the building was designated a Baltimore City landmark , which means that the building 's exterior cannot be altered without approval of the city Commission for Historical and Architectural Preservation . On June 21 , 2007 , the school 's Alumni Association received a historic preservation award from Baltimore Heritage for its leadership role in preserving the building as an historic Baltimore landmark . 
