Pierre Cartier established the New York City branch in 1909, moving in 1917 to 653 Fifth Avenue, the Neo-Renaissance mansion of Morton Freeman Plant (son of railroad tycoon Henry B. Plant) and designed by architect C.P.H. Gilbert. Cartier bought it from the Plants in exchange for $100 in cash and a double-stranded natural pearl necklace valued at the time at $1 million. By this time, Cartier had branches in London, New York and Saint Petersburg and was quickly becoming one of the most successful watch companies in the world.