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

Marble facade colonnades facing east toward Broad Street  

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

The facade of 11 Wall Street is simpler in design but contains architectural details similar to those at 18 Broad Street. 

The facade is highly decorated with colonades and sculptures 

The words embossed on the facade 

Board on the wall of the stock exchange 

1929 - Stock Market Crash of 1929  On "Black Thursday", the economic bubble of the Roaring Twenties finally burst. Triggered by an overconfident public who were actively trading stocks purchased with easy credit, a raise in the interest rate by the Federal Reserve, low wages, the proliferation of debt, a struggling agricultural sector and an excess of large bank loans that could not be liquidated. Stock prices fall sharply on a day of heavy liquidation. The following Monday, "Black Monday", the stock market falls 22.6%, the highest one-day decline in U.S. history. The crash triggers similar declines in markets around the world. The next day, "Black Tuesday", panic sets in as investors all try to sell their stocks at once. Over 16 million shares of stock were sold, setting a market record of over $14 billion in paper losses. Stock tickers could keep up with the heavy trading volume. At the end of the day, the market was down 33 points, more than 12.8% and the Great Depression began. Panic set in, and on October 24, Black Thursday, a record 12,894,650 shares were traded. ... Black Monday was followed by Black Tuesday (October 29, 1929), in which stock prices collapsed completely and 16,410,030 shares were traded on the New York Stock Exchange in a single day

1907 - 1907 Bankers' Panic Knickerbocker Crisis  The Panic of 1907 began with a run on the Knickerbocker Trust Co. of New York. News soon emerged that it was caught up in a scam by bankers Augustus Heinze and Charles Morse, who had borrowed and embezzled vast sums to corner the market in shares of United Copper causing the NY Stock Exchange to fall 50% from its peak

2008 - Stock Exchange’s Ex-Chief Wins Battle to Keep 140$ retirement pay  On July 1, 2008, the New York State Court of Appeals dismissed all claims against Grasso. The majority opinion stated that since the NYSE was now a subsidiary of a for-profit multinational corporation, the State of New York had no oversight over the affairs of the company in this matter and that prosecution was "not in the public interest".

1967 - The 1st Woman to Own a Seat on the New York Stock Exchange  The first woman to head one of the NYSE's member firms. She joined the 1,365 male members of the exchange on December 28, 1967. Siebert is sometimes known as the "first woman of finance", despite being preceded in owning a brokerage by Victoria Woodhull. When Siebert purchased her seat, she wasn’t issued the standard scroll all new members received, and which she was required to display. She didn’t receive it until the following year, when the exchange had a new president. Siebert wasn’t universally welcomed. Headlines such as “Skirt Invades Exchange” and “Powder Puff on Wall Street” conveyed a reluctance on “the Street” to accept a sea change that had been making its way through many other professions for years.

1870 - The 1st Woman Stockbroker on Wall Street  Woodhull, with sister Tennessee (Tennie) Claflin, became the first female stockbrokers and in 1870 they opened a brokerage firm on Wall Street. Wall Street brokers were shocked. "Petticoats Among the Bovine and Ursine Animals," the New York Sun headlined. Woodhull, Claflin & Company opened in 1870, with the assistance of the wealthy Cornelius Vanderbilt, an admirer of Woodhull's skills as a medium; he is rumoured to have been Tennie's lover, and to have seriously considered marrying her. Woodhull made a fortune on the New York Stock Exchange by advising clients like Vanderbilt. On one occasion she told him to sell his shares short for 150 cents per stock, which he duly followed, and earned millions on the deal. Newspapers such as the New York Herald hailed Woodhull and Claflin as "the Queens of Finance" and "the Bewitching Brokers."

1792 - Buttonwood Agreement  The Buttonwood Agreement is the founding document of what is now New York Stock Exchange and is one of the most important financial documents in U.S. history. The agreement organized securities trading in New York City and was signed on May 17, 1792 between 24 stockbrokers outside of 68 Wall Street. According to legend the signing took place under a buttonwood tree where their earliest transactions had occurred. The New York Stock Exchange celebrates the signing of this agreement on May 17, 1792 as its founding.