A lot of archaeology has been going on in what is modern Bulgaria. Most of the finds concern the Roman era but now and again some very old prehistory is dug up. At http://archaeologyinbulgaria.com/2015/05/13/
The settlement involved two storey houses and was pre-planned by a new people entering the Balkans. They had obviously moved out of Anatolia and the date is interesting – shortly after the 6000BC global event. They are all part of the spread of farming from the Fertile Crescent and Anatolia into the Balkans and Greece, and then fanning out towards central Europe and southern Russia. So far, 60 houses have been excavated. Some of them were deliberately torched – individually and not the settlement as a whole. There are of course some assumptions been made – and we will have to wait and see if we can spot them in the future. One of the assumptions made by the leading archaeologist is that they were farmers and followers of a goddess (shade of Mirija Gimbutas).