The Platte Hunting Lodge was built between 1823 and 1826 and served as the autumn residence of the ducal family of Nassau. During World War II, the building was destroyed down to its outer walls in an air raid and was later restored to use by the “Stiftung Jagdschloss Platte e.V.” Today, the building is used for events and is managed by Wiesbaden Congress & Marketing GmbH.

Program:
The Platte Hunting Lodge is open to visitors from 11:30 a.m. to 3:30 p.m., and guests may tour the property on their own during these hours. Guided tours led by a tour guide will take place at 12:00 p.m. and 1:00 p.m. (free of charge, no registration required). In addition—to mark the 200th anniversary of the building—the “Parforcehorncorps Jagdschloss Platte e.V.” will present a short concert at 2:00 p.m. as part of the event. Admission to this concert is also free.

Since 1994, Freudenberg Castle—a “Field of Experience” for the Development of the Senses and the Mind—has been home to the educational center “Gesellschaft Natur & Kunst e.V.” As part of the “Open Monument Day” organized by the German Foundation for Monument Protection, the Experience Field’s working group will be showcasing the historic Freudenberg Castle on September 12 and 13, from 11 a.m. to 6 p.m. each day. 

Program:
There will be free lectures by the founders of the “Erfahrungsfeld” and other open activities, such as a construction hut where visitors can try their hand at building.

The two-story Kunsthaus, designed by architect Philipp Hoffmann and reminiscent of a palace, was completed in 1863 and initially used as an elementary school, and from 1919 onward as a school for crafts and applied arts, which later became the renowned Werkkunstschule, whose students included the artists Peter Roehr and Dieter Rams. Since 1989, the Wiesbaden Cultural Affairs Office has been responsible for managing the Kunsthaus. The old building houses the studios and the auditorium, which reopened in September 2025 following a lengthy renovation. The new building, featuring an art gallery spanning over 300 square meters, was completed in 2011. The Art Library is located in the basement.

Program:
For Open Monument Day, the newly renovated studio building in the Kunsthaus’s historic wing will open its doors. Visitors will have the opportunity to get a glimpse of the new “art spaces.” In addition, 13 artists will open their studios to the public. Guided tours on the history of the Kunsthaus will be offered.

The section of track between Wiesbaden Central Station and Langenschwalbach—now known as Bad Schwalbach—opened in 1889. The section between Diez and Zollhaus had already entered service in 1870, and the connection from Zollhaus to Langenschwalbach followed in 1894. The station building at Dotzheim was built in 1905 to replace the original structure and is protected as a historic monument. The entire railway line has been a protected historic site since 1987.

Program:
On September 13, the Nassauische Touristik-Bahn will celebrate its 40th anniversary. To mark the occasion, there will be a big station festival at its home station in Dotzheim, featuring live music, guided tours of the grounds, a vintage train exhibition, a bounce house, and delicious grilled food.

In 1883, a wooden observation tower was erected on the Schläferskopf; it was dismantled in 1900 due to dilapidation. The current tower, which stands approximately 30 meters tall, is its successor. It was built in 1905–1906 as part of the redevelopment of the city of Wiesbaden into a spa town. A renovation of the tower took place from 2014 to 2016.

Schedule:
Guided tours depart every 30 minutes from 10 a.m. to 12:30 p.m. Ms. Reinhardt will take interested visitors on a journey into the past of the Kaiser Wilhelm Tower, recounting the tower’s history and the 2016 renovation, and offering a view of Wiesbaden from the tower.

The cornerstone for the former guardhouse and gatehouse was laid in 1791. To this day, the building forms the northern entrance to Biebrich Palace Park and once marked the ceremonial transition between the city, the park, and the former Mosburg. Following a careful and thorough renovation, the historic building is once again in use. It illustrates the historical function of gatehouses and guardhouses as important interfaces between stately estates and their urban surroundings.

Program:
The historic gatehouse at Biebrich Palace Park will open its rooms—which are otherwise accessible only to private visitors—from 11 a.m. to 5 p.m. for National Historic Landmarks Day. Visitors can explore the house and garden, take part in guided tours, and learn more about the history, use, and atmosphere of the gatehouse during an open discussion from 3 to 5 p.m.

More than 7,500 historic sites open their doors and delight a large number of visitors. “Open Monument Day” is Germany’s largest cultural event. Since 1993, it has been coordinated nationwide by the German Foundation for Monument Protection, which operates under the patronage of the Federal President.