Ahlden Castle, located in the town of Ahlden in Lower Saxony, Germany, is a historic structure dating back to the 14th century. Originally built as a fortress, it has undergone various renovations over the years. The castle is known for its picturesque architecture and scenic surroundings, making it a notable landmark in the region. The castle gained historical significance as the residence of Duchess Elisabeth of Brunswick, who was imprisoned there in the 17th century. Today, Ahlden Castle is a popular site for visitors interested in history and architecture, offering a glimpse into the past of German nobility.