Complex sentence: Its graduates have specialised as historians of art and architecture, palaeographers, curators, librarians, archaeologists, and some of the most renowned have specialised in the obvious fields of ancient and medieval as well as contemporary history.
Split into simpler sentences: Its graduates have specialised as historians of art and architecture, palaeographers, curators, librarians, archaeologists. Some of the most renowned have specialised in ancient and medieval as well as contemporary history.