Preobrazhensky Regiment
The Preobrazhensky Life-Guard Regiment (, "Preobrazhensky leyb-gvardii polk") was one of the oldest and most elite guard regiments of the Imperial Russian Army. Along with the Semyonovsky Regiment, the Preobrazhensky Regiment also served as a gendarmerie unit for the state Secret Chancellery (secret police) in the 18th century, headed by Prince Fyodor Romodanovsky.