What is your world based on?

I know that the AGOIAF world is based on historic Britain and parts of it are based on the Mediterranean as well. I know that most video games base themselves off IRL places like the Pokemon regions being based on places in Japan, America and Europe.

If your world was based on a real place or historic era, what was it? My world is based on a semi-European style of world with slices of Asian and American cultures in a neo-medieval technological age.