New York Stock Exchange

1817 A group of NY brokers formally establish the New York Stock and Exchange Board, an organization that later will be renamed the NewYork Stock Exchange (N.Y.S.E.). formalized and established its first quarters in a rented room at 40 Wall St. The exchange grew into the largest in the world of companies listed with a capitalization of over $30 trillion. Technology changed as inventions such as the telegraph, stock ticker, and computers transformed stock trading from the physical exchange of documents between specialist brokers on the trading floor to an electronic platform.

1865 The first New York Stock Exchange building was completed in 1865. About 15 years later, James Renwick expanded the building.

1903 The structure was in turn demolished to make way for Emily Post's architect father George Post's Beaux Arts Style building. The exchange is now owned by ICE, a holding company based in Atlanta.

The central third of the block contains the original structure at 18 Broad Street, designed in the neoclassical style by George B. Post.

The northern third contains a 23-story office annex at 11 Wall Street, designed by Trowbridge & Livingston in a similar style.