My post-graduate research work dealt with ancient Roman history. I still can recall the moment when I chose ancient history as a primary field of research. It was by far the most challenging topic because it required learning Latin and Greek as well as a bunch of modern Eropean languages.
Above all, the Romans have never made it so far as to Siberia, so I had to go to the West to continue my research. First, I went to Vienna, one of the major centres of classical studies.
Vesuvian area around Pompeii became my second destination. 4 years in a row I spent all summer season there, exploring ancient Roman and Greek sites, as well as medieval and modern art and culture of the intensely rich Campania region.