The Soldiers' and Sailors' Arch is a triumphal arch at Grand Army Plaza in Brooklyn, New York City, just north of Prospect Park. Built from 1889 to 1892, the arch is dedicated "To the Defenders of the Union, 1861–1865". The eastern end with a stairway to the observation deck and crowning sculpture was occasionally open to the public until the early 2000s, when deterioration of the interior made it unsafe for the public.