Introductory study Those considered as “certain" are settlements mentioned up to 1347 in documents, mu- nicipal books, period Jewish documents or narrative sources. Settlements in places con- firmed by a combination of several less reliable sources are also categorized as “certain". This particularly concerns the Jewish settlement in the royal town of Cáslav, confirmed in two formulary collections (Codex Jacobi and Summa Gerhardi) and in the so-called Nuremberg Martyrology. Conversely, the settlements which are documented with only a single mention in formulary collections or in another less reliable type of sources were included in the “assumed" category. Even localities such as Kouřim, Vilémov, Habry and Mladá Boleslay were included here, because in these places we can assume the existence of a Jewish settlement on the inference of a document or chronicler’s record, but cannot reliably prove it. This is also the case for the small Moravian town of Podivín, which ac- cording to Cosmas was founded by the convert Podiva (Nr. 10). Although the literature commonly assumes the existence of a Jewish settlement here, the chronicler’s record does not explicitly mention it.90 The already mentioned Nuremberg Martyrology mentions Znojmo, Jemnice, Třebíč, České Budějovice", Čáslav, Příchovice, Jindřichův Hradec and Libiš among the localities in which there were pogroms in 1338.92 The Jewish settlement in Příchovice (a village near Přeštice), Valtice (Feldsberg), Vratěnín (Fratting) and Hrádek near Znojmo (Erdberg) is not confirmed anywhere else for the first half of the 14th century. The iden- tification of the community Libiš (Lubes or, in the Hebrew text, LVBS) is not clear. Both places were therefore left off the map overview. Conversely, Třebíč was included in the category of "assumed locality", because a Jewish settlement is demonstrably proven there by later sources and can also be reasonably assumed for an earlier period. We assume that the locality mentioned before 1346 in the formulary collection Codex Jacobi as “Gretz" is the East Bohemian royal town of Hradec Králové. Although Cosmas does actually mention two settlements on the territory of Prague (one under the Prague Castle and the other one in the Vyšehrad district, settlement or street - as the term is most often interpreted), only one point is placed on our map, unlike Tischler and Hoffmann, because the Vyšehrad suburbium never formed an independent part of the Prague conurbation. Moreover, we do not even know precisely where exactly the “vicus Wissegradensis" lay and it has not 90) Cf. the map in HOFFMANN 2009, pp. 386-387. 91) We assume that the town referred to in the Nuremberger Martyrology is České Budějovice, and not Moravské Budějovice. The Jewish settlement in Ceské Budějovice is confirmed as early as in at the beginning of the 14th century, while the first mention of a Jew from Moravské Budějovice comes from the year 1386 (Jacobo Judeo de Budwicz), CHYTIL/ DEMUT/WOLFSKRON edd. 1856, Nr. 394, p. 171; Nr. 406, p. 172. 92) See SALFELD 1898, pp. 240-241, 249. LXVII