The landmarked Hopper-Gibbons house once hosted abolitionists John Brown and William Lloyd Garrison.
The owner of the Hopper-Gibbons House sued the city to keep a fifth-floor addition on the building.
The owner of a Chelsea house used in the network that helped slaves escape sued the city
The Hopper-Gibbons House's owner may go to court to fight ruling from city board.
Dozens of supporters argued to the Board of Standards and Appeals about the Hopper-Gibbons House.
The city will hear an appeal of its order to remove the fifth floor of Chelsea's Hopper Gibbons House.
The owners of a building which once housed former slaves escaping to freedom are fighting a city order.
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