Mansion House
U.S. National Register of Historic Places
New Jersey Register of Historic Places
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Location	Cadwalader Park, Trenton, New Jersey
Coordinates	40°14′12″N 74°47′22″W / 40.23667°N 74.78944°W / 40.23667; -74.78944
Area	100 acres (40 ha)
Built	1848
Architect	John Notman
Architectural style	Italianate
NRHP reference No.	73001112[1]
NJRHP No.	1779[2]
Significant dates
Added to NRHP	February 6, 1973
Designated NJRHP	May 12, 1972

The Mansion House (also referred to as Ellarslie and the McCall House) is a historic residence located in Cadwalader Park in the city of Trenton in Mercer County, New Jersey, United States. The house was built as a summer residence for Henry McCall Sr. of Philadelphia in 1848, and is one of the earliest examples of Italianate architecture in the United States.^[3] The building was added to the National Register of Historic Places on February 6, 1973, for its significance in architecture and landscape architecture.^[4]

History and description

The house was designed by architect John Notman as an Italianate villa.^[4] It was sold to the park commission of the city of Trenton in 1888. Since 1978 the building has been home to the Trenton City Museum, which features collections of decorative and fine arts.^[3]