MapMaster, there is some speculation regarding the location of Attila's capital. In Hungarian folklore in particular, it was either based on the ruins of the Roman city of Acquincum (today in Budapest), or it was his mobile 'wooden castle' (as described by Priscus rhetor on his visit to Attila's camp), which as you say was based primarily in the Hungarian Great Plain, somewhere near the Tisza River. And, unlike is stated in the text, it was the Tisza that was diverted to bury the dead king. (Shame that Hungarian is not better understood, people with an interest in Attila and the Huns would find a gold mine of information and stories ))    