According to an old Czech legend, the Devil's Furrow (Czech: Čertova brázda) was a distinct line in the landscape, allegedly connecting the place of St. Procopius's activity in Sázava Monastery with his birthplace, 21 km away in Chotouň . The furrow is no longer visible in the terrain, and the interpretation of the various relics found along its supposed route was a matter of debate.[1][2]
Based on recent research, it appears that the foundation of the legend lies in a 5.5 km long (completely straight) linear earthwork (rampart with two ditches) that controlled a significant east-west transportation corridor in the early Middle Ages or earlier.[3]