Regensburg is a historic city located in Bavaria, Germany, along the banks of the Danube River. It is known for its well-preserved medieval architecture, including the Regensburg Cathedral, which showcases stunning Gothic design. The city has a rich history, dating back to Roman times when it was known as Castra Regina. Today, Regensburg is a UNESCO World Heritage Site, attracting visitors with its charming old town, cobblestone streets, and vibrant cultural scene. The Stone Bridge, built in the 12th century, is another notable landmark, connecting the two sides of the city and offering picturesque views of the river.