New York City's oldest law firm, Cadwalader, Wickersham & Taft is headquartered at 200 Liberty Street in Lower Manhattan. The firm's managing partner, Patrick Quinn, oversees approximately 400 attorneys as of year-end 2014. It operates out of five offices across the United States and Europe. In addition to its Wall Street location, Cadwalader, Wickersham & Taft has offices in Washington, D.C., Charlotte, London and Brussels. In 2014, Cadwalader generated $481.5 million, with a profit per partner of $2.21 million.

In 1792, attorney John Wells, a Princeton graduate who was one of approximately 80 lawyers in New York City at the time, founded the law firm that ultimately became known as Cadwalader, Wickersham & Taft. The firm became a partnership called Wells & Strong in 1818 when George Washington Strong joined Wells' practice.

Wells' death in 1823 prompted Strong to bring in George Griffin as partner. Griffin then left in 1838 and George Washington Strong partnered with Marshall Bidwell. George Washington Strong's son, George Templeton Strong, a lawyer and noted diarist, joined the firm in 1844. The firm became known as Strong, Bidwell & Strong. The firm became Bidwell & Strong in 1855 after George Washington Strong's death. Charles E. Strong, George Templeton Strong's cousin, became the firm's chief in the 1870s. During his tenure, he considered shuttering the firm and moving from law to banking. In 1878, Strong partnered with John Lambert Cadwalader, who was assistant secretary of state during President Ulysses S. Grant's administration.

According to wikipedia