On September 16, 1920, an explosion took place by 23 Wall Street- the J.P. Morgan & Co. Building- killing   thirty-eight and injuring about 400 people.  The bombing was never solved and the blast marks were never repaired. The building was (and is) across the street from Federal Hall, the New York Stock Exchange, down the block from Trinity Church and a block south of The Federal Reserve Bank of New York-and near many other places of interest in history packed lower Manhattan.