To get an idea how famous Worth was in the fashion world..

..worldwide, and the scale to which he did things – when the Suez Canal was finished in 1869, Empress Eugenie of France had Worth make her 250 dresses so she could attend the opening.
 
As the Second Empire of France (the Bourbons back on the throne after the Napoleon eras; Eugenie was the wife of a descendant of the Louis who had been dethroned by the French Revolution – and were back again) boomed, so did Worth catering to the multitude of royals.
(Photo: an 1861 early career Worth royal gown)