The "baths" were the second to have a public library within the complex. Like other public libraries in Rome, there were two separate and equal sized rooms or buildings; one for Greek language texts and one for Latin language texts. The surviving library had three walls covered by niches (a total of 32) that housed the books. A larger niche in the middle of the southern wall likely contained a statue. A masonry ledge in front of the three other walls probably served as a bench. The floor is made from marble.