The Leopoldsberg (425 m, 1,394 ft) is perhaps Vienna’s most famous hill, towering over the Danube and the city. Leopoldberg’s most prominent landmark is the church which stands at the top, and which is clearly visible from Vienna below. Construction of the Leopoldsberg Church, dedicated to Saint Leopold, began in 1679; an expansion following a design by Antonio Beduzzi was undertaken 1718–30. Other renovations were to follow. Across the square from the church, on what used to be a tower of the fortification system, a memorial to those Austrians who returned home from captivity after World War II was created in 1948.