The monastery of St. Katharinental is a former monastery complex on the banks of the Rhine near Diessenhofen. The monastery church, an outstanding creation of the southern German baroque period, deserves special mention. Today, the historic monastery buildings house a rehabilitation clinic.

The history of the former Dominican convent dates back to the beginning of the 13th century. It experienced various periods of prosperity over the centuries and also survived the Reformation turmoil after 1529 unscathed. In 1869, the convent was finally dissolved and the remaining nuns relocated.

The convent church, built between 1732 and 1734 by Johann Michael Beer, houses an important organ from the time of its construction. The main portal of the church is open daily, and access to the interior is possible twice a week in summer and twice a month in winter, in the presence of an expert. In addition, there is a small house museum where the building history of the monastery and its cultural-historical significance as a spiritual centre on the Upper Rhine - both in the time of mysticism and at the time of the monastery reforms of the 18th century - are explained with documents. The museum is not open to the public.