Title: Medieval frontier
Subjects: History, Hoogheemraadschap van Rijnland (Netherlands), Human ecology, Land settlement, Reclamation of land, Rural conditions, Social history, Ecologie humaine, Wirtschaft, Geschichte, Siedlung, Ontginning, Medieval, Humanokologie, Conditions rurales, Histoire, Colonisation interieure, Ameliorations foncieres, Hoogheemraadschap van Rijnland (Pays-Bas)
Places: Netherlands, Rijnland, Rijnland (Netherlands)
Time periods: Medieval, 500-1500