A previously unknown medieval castle has emerged from the Swiss landscape after a researcher studying high-resolution terrain maps identified telltale features of an early fortification near Uesslingen-Buch in northeastern Switzerland. The discovery of this 10th to 11th-century castle site, confirmed by the Thurgau Office of Archaeology, represents a significant addition to our understanding of medieval settlement patterns in the region and may finally solve a centuries-old historical puzzle about the location of a lost fortress destroyed in 1079. The breakthrough came when a castle researcher from Canton Bern was analyzing LiDAR-derived terrain maps on his computer, searching for distinctive landscape formations that might indicate forgotten fortifications. What he found were two small plateaus surrounded by steep defensive ditches, located just
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