Dillingen an der Donau is a picturesque city located in the district of Dillingen in the region of Bavarian Swabia, Bavaria. Situated along the banks of the Danube River, the city is known for its charming old town with well-preserved historic buildings and cobblestone streets. The city is home to several notable landmarks, including the Dillingen Castle, a medieval fortress that offers stunning views of the surrounding countryside. The St. Peter's Church, with its beautiful Baroque architecture, is another must-see attraction in the city.