2022 ABSTRACT In this paper we present 30 preserved boundary marks of the cadastral municipalities from the period of the Franciscan cadastral survey from 1818 to 1819, which we found in the vicinity of villages of Sežana, Lokev, Rodik, Markovščina and Materija in Slovenia. The studied boundary marks of the cadastral municipalities are 70 cm or more high, mostly with carved inscriptions, sometimes also with coats of arms, or have a form of isolated, larger rocks, which also have carved inscriptions. Some once had a simultaneous cadastral and trigonometric role, and some still retain this dual role today. With the help of two of them, Križen drev and Kokoš (Jermanec), we have discovered and proved, how the borders of the cadastral municipalities in this area date back at least to the 16th century. ...we can consider the present-day boundaries of the cadastral municipalities in this area of Slovenia as one of the longest-lasting and preserved spatial division.