Brömserburg, Castle in Rüdesheim am Rhein, Germany

Brömserburg, also called Niederburg, stands near the Rhine bank in Rüdesheim am Rhein. Its four three-storey wings, with walls 4 to 5 metres thick and small round-arched windows, enclose a narrow rectangular courtyard. The square bergfried was rebuilt on its surviving stump and now carries a walkable viewing terrace.

Two building phases are documented: the first, with a ring wall and gate tower, dates between 1044 and 1216; the second was completed around 1186–1190. In 1640 French troops blew up the Rhine-side southeast corner, destroying the donjon and the upper keep. The castle passed to the Metternich family in 1678 and was later remodelled as a country house after 1811.

Since 1950 the castle has housed the Rheingau Wine Museum, with exhibits on wine culture from antiquity to the present. It is run by the Rüdesheim family Wendel's firm, which also operates Siegfrieds Mechanisches Musikkabinett, a collection of historic musical instruments. As of 2023 the castle and museum are closed to the public.

The castle stands near the Rhine bank in Rüdesheim, surrounded by a small park that is part of the museum. The Rheingau Wine Museum inside has been closed to the public since 2023, so check its status before planning a visit. The inner courtyard is narrow and the rooms are vaulted, and the keep has an accessible viewing terrace.

In 1640 French troops under Duke Henri II d'Orléans blew up the south-east corner facing the Rhine, destroying the upper part of the bergfried and the donjon. A mine passage driven into the keep was never fired and can still be seen today.