Very close to Schieder is the "Alt-Schieder" fortification - a clearing that is popularly known as the Römerschanze. It consisted of two wall systems. The older fortification is probably from the early Middle Ages. Remains of the complex can be recognized as a rampart and outer ditch. The younger fortification system encompassed the entire clearing. The castle had two gates. Excavation finds uncovered the foundations of a church and a cemetery in addition to various strip foundations. This royal court from the 11th century was attributed to the Archbishopric of Magdeburg until the noblemen of Lippe came into its possession. In 1484, they handed over the "Alter Hof Schieder" to the Augustinian monastery in Blomberg.