A piece of granite fell from the Municipal Building in 1987, landing on a ramp on the Brooklyn Bridge, although no one was injured. However, a subsequent investigation found other loose rocks on the facade, and as a result, netting was placed on the facade. In 1988, workers began placing scaffolding along the building's entire facade in preparation for the first large-scale restoration of the facade, which was to begin the next year. The renovation was expected to cost $58 million and required of steel tubes to support the massive scaffolds. The facade restoration was undertaken by the architects Wank Adams Slavin. Another restoration of "Civic Fame" took place during this time. On October 14, 2015, the building was renamed after David N. Dinkins, New York City's first African-American mayor.