Most of the free royal cities and all mining cities of Hungary banned Jewish in-settlement by 1840. Nevertheless, in my research I was first focusing my attention to the turn of the 18th and 19th centuries, because in effect the roughly 50 years preceding the settlement permits for the inner areas of the indicated cities saw several waves of Jewish immigration in Hungary. However, it was the first important stage of mutual acculturation of the above-mentioned urban societies and Jewish communities. It was a period of time that is essential for the understanding of urban settlement, the subsequent integration and the controversial processes of assimilation/dissimilation and intra-urban spatial segregation.
The closing date of our study falls on the year of 1870 because my intent was to do an extensive survey of space and society structures relying on the data of the poll taken in that year, or to be more precise on the basis of the analytic sources of the Geoinformatic Social History Database of Debrecen (GISHDD) created by the digital processing of the manuscript maps and the statistical sheets of the age in Debrecen.