| Mansion House | |
| Location: | Cadwalader Park, Trenton, New Jersey |
| Coordinates: | 40.2367°N -74.7894°W |
| Built: | 1848 |
| Architect: | John Notman |
| Architecture: | Italianate |
| Added: | February 6, 1973 |
| Refnum: | 73001112 |
| Designated Other1 Name: | New Jersey Register of Historic Places |
| Designated Other1 Abbr: | NJRHP |
| Designated Other1 Link: | New Jersey Register of Historic Places |
| Designated Other1 Date: | May 12, 1972 |
| Designated Other1 Number: | 1779[1] |
| Designated Other1 Num Position: | bottom |
| Designated Other1 Color: |
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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.[2] The building was added to the National Register of Historic Places on February 6, 1973, for its significance in architecture and landscape architecture.[3]
The house was designed by architect John Notman as an Italianate villa.[3] 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.[2]