The SzŽchenyi Chain Bridge is a suspension bridge that spans the River Danube between Buda and Pest, the western and eastern sides of Budapest. It was the first permanent bridge across the Danube in Budapest, and was opened in 1849. The bridge has the name of Istv‡n SzŽchenyi, a major supporter of its construction, attached to it, but is most commonly known as the Chain Bridge. At the time of its construction, it was regarded as one of the modern world's engineering wonders.