
thumb|Roman caltrop at the Westphalian Museum of Archeology (German: Westfälisches Museum für Archäologie), Herne, North Rhine-Westphalia, Germany
thumb|Roman caltrop at the Westphalian Museum of Archeology (German: Westfälisches Museum für Archäologie), Herne, North Rhine-Westphalia, Germany
thumb|Different types of caltrops and metal soles that can be buckled underneath as a countermeasure from Codex Löffelholz, Nuremberg, 1505
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).