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Rosemont is a community in Pennsylvania on the Pennsylvania Main Line between Bryn Mawr, Pennsylvania, and Villanova, Pennsylvania, lying partly in Radnor Township, Pennsylvania, and partly in Lower Merion Township, Pennsylvania. Part of the geographic area is served by the Bryn Mawr, Pennsylvania, ZIP code. Rosemont is served by its own stops on both the Paoli/Thorndale Line of SEPTA Regional Rail and the Norristown High Speed Line.
The community of Garrett Hill is in Radnor Township and in the Rosemont section.

Rosemont is the town used by soap opera creator and writer Agnes Nixon as a model for the fictional town of Pine Valley, Pennsylvania, the setting for the popular daytime drama All My Children, which debuted on ABC in 1970. The fictional town of “Rosewood” Pennsylvania in the show “Pretty Little Liars” is also based on Rosemont, PA.

The Joseph Sinnott Mansion was listed on the National Register of Historic Places in 1980. The neighborhood of “Beaupre” in Rosemont was once the 200-acre estate of the same name, built for Alexander Cassatt’s son Robert. The original mansion still stands and is part of Rosemont Presbyterian Village, and the original French iron gates flank entrances from Conestoga Road and South Ithan Avenue.

Public schools
Pupils living in the Radnor Township portion of Rosemont attend schools in Radnor Township School District, while students in the Lower Merion Township portion attend schools in the Lower Merion School District. Until 1980, the Radnor Township, Delaware County portion of the community was served by Rosemont Elementary School, located in the Garret Hill neighborhood of the town. The Rosemont Business Campus now stands on the former elementary school site. Children in these neighborhoods are now bused to the Radnor Elementary School.

Private schools
Rosemont School of the Holy Child, located in Rosemont and in Lower Merion Township, is affiliated with but not governed by the Roman Catholic Archdiocese of Philadelphia. The school is adjacent to Rosemont College. The Agnes Irwin School is located on Ithan Avenue in Rosemont. It is an all-girl, non-sectarian, day school for PreK-Grade 12 founded by Miss Agnes Irwin and her sister Sofie. The Roman Catholic Saint Thomas of Villanova Parish run by the Augustinian Order also ran a parochial school, which closed in the 1980s, adjacent to their Rosemont chapel and serving the Rosemont community.

Colleges and universities
Rosemont College is in Rosemont on Montgomery Avenue at Curwen Road.

Agnes Irwin School

275 S Ithan Avenue
Rosemont, PA 19010
Grades Pre-K – 12

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