Henry Poole & Co, the London Savile Row tailors

[LouisFerdinand]

Emperor Napoleon III of France gave the shop of Henry Poole & Co its first Royal warrant.     
Some of the high-profile clients included Prince Otto von Bismarck, Queen Alexandra, and Edward VII as Prince of Wales.         
Edward VII's wife, Queen Alexandra bought her family gifts there.

[LouisFerdinand]

His Royal Highness Prince Alfred The Duke of Edinburgh, King Leopold II of the Belgians, and His Royal Highness Prince Louis of Hesse were customers of Henry Poole & Co.

[LouisFerdinand]

https://www.youtube.com/watch?v=Uklt1fbkyPA   
Insights into the original Saville Row tailor