"Using emerging technological advances in color photography, Sergei Mikhailovich Prokudin-Gorskii [there are multiple spellings of his name] (1863-1944) made numerous photographic trips to systematically document the Russian Empire. He conducted most of his visual surveys between 1909 and 1915, although some of his work dates as early as 1905. The Empire at this time stretched 7,000 miles from west to east and 3,000 miles from north to south and comprised one-sixth of the earth's land mass. It was the largest empire in history and spanned what today are eleven different times zones."
These photos are stunningly beautiful, haunting, unique, historically interesting, everything you could want really
And there are so many of them! A deep rabbit-hole for sure