Herzogspark, Botanical garden in Regensburg, Germany.

Herzogspark is a botanical garden in Regensburg, located along the Danube and made up of several themed sections as well as a medieval tower. One section follows a Renaissance layout with boxwood hedges, while another is dedicated to plants mentioned in the works of Shakespeare.

The Prebrunnturm gate tower was begun on 22 April 1293 as the western counterpart to the Ostentor, controlling the trade road to Nuremberg. The site became a private garden in 1804, when Prince-Bishop Karl Theodor von Dalberg sold plots with remains of the old fortifications to Georg Friedrich von Müller. The city bought the grounds in 1935 and converted them into a public park between 1950 and 1952.

The park's name comes from Duchess Marie Sophie of Württemberg, who lived in the Württembergisches Palais from 1843 after divorcing Duke Paul Wilhelm in 1835 and kept calling herself Duchess Paul of Württemberg. The park is often wrongly called Herzogpark. Along one boxwood hedge grow plants named in Shakespeare's plays, and themed teaching beds cover alpine flora, white-flowering plants and southern plants.

The garden is within easy walking distance of Regensburg's old town and can be entered directly from the riverbank. The medieval tower is only open during summer, and the park closes early in the evening.

The Prebrunnturm's entrance plaque, guarded by a lion figure, records that construction of Regensburg's medieval walls began on 22 April 1293, the vigil of St George. The tower, about 10 metres tall on a square plan, was the western counterpart of the Ostentor gate tower and controlled the trade road to Nuremberg and the Danube ferry.