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1849–1851, Niernsee and Neilson; 1892 renovations and addition, Charles Platt; 1989–1991 renovation, James R. Grieves Associates. 1 W. Mount Vernon Pl.
  • (Alexander Heilner)
  • (Alexander Heilner)

This imposing Greek Revival house was among the first erected along Mount Vernon Place, setting the tone for this exclusive neighborhood. Built for physician J. Hanson Thomas, it was touted by the Baltimore Sun as “one of the most elegant and princely specimens of architectural taste and mechanical skills” in the city. The twenty-two-room mansion encompasses a sixty-foot-long parlor, Gothic Revival dining room, and Elizabethan-styled library. The Jencks family purchased the house in 1892, adding a rear conservatory and a Tiffany dome above the staircase. It was purchased by the Hackerman family in 1985 and donated to the city; it houses the Walters Art Museum’s Asian Art collection.

Writing Credits

Lisa Pfueller Davidson and Catherine C. Lavoie



  • 1849


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Lisa Pfueller Davidson and Catherine C. Lavoie, "HACKERMAN HOUSE (THOMAS-JENCKS-GLADDING HOUSE)", [Baltimore, Maryland], SAH Archipedia, eds. Gabrielle Esperdy and Karen Kingsley, Charlottesville: UVaP, 2012—,

Print Source

Buildings of Maryland, Lisa Pfueller Davidson and Catherine C. Lavoie. Charlottesville: University of Virginia Press, 2022, 155-156.

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