Cartographic Details: Scale not given (E 80°--E 120°/N 30°--N 1°).Relief shown by hachures.Map showing the boundaries of Catholic dioceses in Russia in the 1850s. Probably Tav. CI from: L'orbe cattolico ossia Atlante geografico storico ecclesiastico / [opera del commendatore Girolamo Petri]. Roma : Tipografia della reverenda Camera apostolica, 1858-1859. 48 x 63 centimeters Scale not given. Ames Library of South Asia Maps