Right in the center of the center, but on a side street. There is a supermarket across the way, cafe below and restaurants everywhere. The apartment is big, has nice Roman details and offers good seperation. (One bed upstairs, one downstairs) Nicola and his brother are fantastic hosts as every single review has stated. I've stayed in quite a few airbnbs in Rome, and if you are looking to be right in the historic center this is a fantastic option.