Salvatorian Seminary Bagno, Lower Silesian Voivodeship, Religious seminary and palace in Bagno, Poland.

The palace in Bagno, known as the Old Castle, is a Baroque residence begun in the early 18th century on the remains of a 13th-century stronghold of Duke Konrad II. Its oldest section was built for Count Heinrich Leopold von Seher-Thoss and his wife Johanna Friederike von Wentzky, whose coats of arms appear in a cartouche above the park-side entrance. A second, Neo-Baroque wing called the New Castle was added in 1907–1913 to designs by Paul Jarosch.

A fortified house at Bagno is documented in 1337, when Poppo von Haugwitz was named its owner; rebuilt in Renaissance style in the 16th century, it was destroyed in the Thirty Years' War. Count Leopold von Seher-Thoß had the present Baroque palace built between 1734 and 1743. Brewery owner Georg Kißling bought the estate in 1905 and added the Neues Palais from 1907 to 1913. In 1930 the Salvatorians acquired it and set up a monastery with seminary and novitiate.

The Salvatorians, named after the Savior, bought the estate in 1930 through the Silesian Land Society and set up a house of formation; by 1940 they had opened a philosophy and theology study house and then a novitiate. The neo-Romanesque parish church of the Assumption in the village was funded by the Kissling family and built in 1905–1906.

The palace stands in Bagno, in the Trzebnica district; the complex includes the Baroque palace, the 1913 New Palace, outbuildings and a landscape park of about 5 hectares with old firs and oaks. The park lies around the buildings, with a pond and island to the north. The interiors serve the Salvatorian seminary and monastery, so visits depend on the community; the park can be walked separately.

The estate's landscape park covers about 5 hectares and holds a giant fir, a California fir, a swamp oak and a Canadian hemlock, plus a small church, the Philosophers' Arbor and a grotto. The iron arbor dates from 1905, the gardener's house from 1910.