Robert Heś – is a historian, graduate of the University of Wrocław and the Doctoral Course of the Silesian Studies at the University of Wrocław and Head of the Documents Collection of the National Museum in Wrocław. His scientific research covers history of medieval and early post-medieval Silesia and Upper Lusatia, history of military and legal archaeology. He is a member of the Association of Art Historians and SOiBZP – the Association for Protection and Research of Legal Monuments and collaborator of the team of the Bibliography of History of Silesia. He has been co-curator of the exhibition Gruss aus… Dolny Śląsk na dawnych pocztówkach [Gruss aus... Lower Silesia on old postcards] (2011). Author of (selected): Koń bojowy i jego oporządzenie na XIV-wiecznym Śląsku [The horse in warefare and its field-gear in 14th-century Silesia] (2001), Joannici na Śląsku w średniowieczu [The Order of Saint John in medieval Silesia] (2007), Joannici w oczach Ślązaków w średniowieczu i epoce nowożytnej [The Order of Saint John in the eyes of Silesians in the Middle Ages and the post-medieval era] (2007), Początki broni palnej w Zgorzelcu (Görlitz) 1393–1420 [The beginnings of firearms in Görlitz 1393–1420] (2009), Komandoria Krzyżowców z Czerwoną Gwiazdą w Ziębicach w średniowieczu [The commandry of the Knights of the Cross with the Red Star in medieval Ziębice (Münsterberg)] (2010), Średniowieczne płyty nagrobne z kościoła pod wezwaniem św. Marii Magdaleny we Wrocławiu [Medieval tombstones from the St Mary Magdalene church in Wrocław] (2010), Closing Commanderies or the Transfer of Hospitaller Convents in Medieval Silesia (2011), Wrocław między trzema królestwami – wyprawa Jagiellonów na Śląsk w 1474 r. [Wrocław between three monarchies – the Jagiellons’ military expedition against Silesia in 1474] (2012). Co-author of (selected): Nekropolia rycerska w Lutomi pod Świdnicą. Przyczynek do genealogii rodów Atze i Betschau [The knights’ cemetery in Lutomia near Świdnica. A contribution to the genealogy of the families Atze and Betschau] (2002), Muzeum Narodowe we Wrocławiu 1947–2007 [The National Museum in Wrocław 1947–2007] (2008), Ikonografia Dolnego Śląska. Pocztówki. Katalog zbiorów Muzeum Narodowego we Wrocławiu [The iconography of Lower Silesia. Postcards. Catalogue of the collections of the National Museum in Wrocław], vols 1–2 (2011).