The archives at R. C. Archibishopric in Kalocsa prepared the catalog of the old maps in their collection and put it on their website. The list consists of more than 800 old maps - mostly from the 18th and 19th centuries and mostly covering single settlements from the territory of the archibishopric, that is old Pest-Pilis-Solt-Kiskun and Bács-Bodrog Counties. Yes, there are many from former Batschka, too.