although the population of the kingdom of poland in late middle ages consisted mostly of poles, influx of other cultures was significant: particularly notable were jewish and german settlers, who often formed significant minorities or even majorities in urban centers. sporadically migrants from other places like scotland, netherlands settled in poland as well. at that time other notable minorities included various incompletely assimilated people from other slavic tribes (some of whom would eventually merge totally into the polish people, while others merged into neighboring nations).