The rose garden is located in the inner courtyard of the New Residenz. It was designed in 1733 and the lay out is visible on the satellite image if you zoom in on the map below. There is a central pool, encircled by clipped limes.
Domplatz 8, Bamberg, South West, Germany, 96049
All year. Daily. Open 9am to 6pm (10am to 4pm from October to March).