Tremain became such a large city back in the days when the emperor required all lords to attend court, which fueled a huge service industry. Inns, restaurants, entertainment establishments and the pleasure industry are all still a dominant aspect to the city.
Tremain does boast some small guilds, but few overarching guild monopolies. This is in large part because the various sections of the city tend to aim at self-sufficiency, rather than work as a whole unit. As is common in most large cities, socio economic status and ethnicity both play a large role in determining the borders between various sections of the city.
Dunstan also boasts several other universities, all within or on the boarders of Tremain, including the University of Engineering, the University of Pelor’s Mercy—a great school of medicine and the healing arts—, and The University of Philosophy and Science.