In the 1970s, the remains of a thermal spa and Roman Domus were discovered under the Historical Archives of the Bank of Naples during renovations. A corridor at the end of a large courtyard and tucked between two Sanfelice staircases leads to the archaeological area. There, are the remains of a hypocaust, the under floor heating system for a thermal spa as well, as a few rooms that are believed to have been a Roman Doums, the home of an upper class or wealthy freedman.