The historical McKinley Monument was built in 1907 and sits prominently downtown outside Buffalo's City Hall. Between 2015 and 2018, Flynn Battaglia worked with the City of Buffalo and Conservation Solutions to repair, conserve, and clean portions of the monument's masonry, including the Carrara marble ballasts and the rare Swanton Red marble featured on the monument's floor.

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Flynn Battaglia is currently working with the City to provide another round of design services for the McKinley Monument's maintenance and preservation.