Where would you find the most history about Transylvania? Would it be in Transylvania or elsewhere? Most of the historical documents are found in Romania, Hungary and Moscow. Not all are found in Transylvania itself.
Beyond the legends and the time of the Romans? There is Dacia, and the Roman invasion, Dracula and the novel. But there are also the people, the places. Browning, the English poet, wrote about one such group-- the Saxons, who lived in Transylvania. (Some still do but most live in North America or Germany now.)
Translyvania is a unique and wonderful place.