Let’s take a look at this serif sub-type: Old Style Serifs. They certainly look old, and that is because they date back to the mid 1400s. One of the main features of this category is that their axis often inclines to the left, which means that the thinnest parts of the letter forms appear on the angled strokes:
Arno Pro is a typeface designed by Robert Slimbach for Adobe.
Named after the Florentine river which ran through the heart of the Italian Renaissance, Arno draws on the warmth and readability of early humanist typefaces of the 15th and 16th centuries. While inspired by the past, Arno is distinctly contemporary in both appearance and function. Designed by Adobe Principal Designer Robert Slimbach, Arno is a meticulously-crafted face in the tradition of early Venetian and Aldine book typefaces.
You can get Arno Pro here.