The Greeks and Romans used allot of divination. Aeromancy possibly being the most used, many Roman generals claimed to have foreseen the results of their conflicts by listening to the wind. Hydromancy, pyromancy, and necromancy were also common practices in Greece at times. I don't really know a whole lot more than that about it, but those would be good places to start if you want to follow your heritage.
I know Rome and Greece are not the same places, but I think they used the same magicks.