SUPERSTRUCTURES conducted a restoration of the rotunda interior of the Tweed Courthouse. Designed by John Kellum and Leopold Eidlitz and completed in 1881, the building is a National Historic Landmark and New York City Landmark (both the exterior and interior).

The project included repair or replacement of cracked and spalled masonry units, masonry re-pointing, and joint sealant replacement at existing windows and coping stones.

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